JP2009065526A - Information processing system, information processing method, server device and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information processing system, an information processing method, a server device and associated techniques thereof, in which the information regarding a display image can be prevented from being leaked due to the noise of electromagnetic waves (electromagnetic signals), when displaying on a display unit of a terminal device the display image formed, based on information or the like given from a server device to the terminal device via a network. <P>SOLUTION: Tampering processing is applied to an image element to be modified, specified by a character code or vector information in transmission information to be applied from a server device 20 to a terminal device 10 via a network 30, and the transmission information is then applied from the server device 20 to the terminal device 10. In the modification processing, processing or the like is performed for applying modification to a contour part of the image element to be modified. As the image element to be modified, an image element for preventing information from leaking due to electromagnetic signals is set. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an information processing system, an information processing method, a server device, and related technologies, and more specifically, information related to a display image due to noise (electromagnetic signal) unintentionally emitted from a terminal device including a display unit. TECHNICAL FIELD OF THE INVENTION

  It has long been known that electronic devices emit unintentionally weak electromagnetic noise (electromagnetic signals) during operation. This emitted electromagnetic signal includes a signal correlated with an information signal inside the device. 2. Description of the Related Art In recent years, attention has been focused on a technique for acquiring information inside an apparatus from an observation signal obtained by receiving this emitted electromagnetic signal.

  A technique for acquiring information inside the apparatus from observation of electromagnetic signals emitted from the electronic apparatus and a technique relating to the countermeasure are called “TEMPEST (Transient Electromagnetic Pulse Surveillance Technology)”. In this TEMPEST, for example, it has been reported that an electromagnetic signal emitted from an electronic device such as a personal computer (hereinafter referred to as “PC”) can be observed to reproduce a display image on a monitor.

  Therefore, by using this TEMPEST, information on the display image leaks from the reception signal of the electromagnetic signal that is unintentionally emitted from the electronic device having the display unit. Since personal information and confidential information may be displayed on the display unit of the electronic device, this is a serious problem in terms of information security. Specifically, when characters or the like are displayed on the display unit in an electronic device such as a PC, an electromagnetic signal containing a display image signal of the display unit is unintentionally emitted from the electronic device. This electromagnetic signal can be observed using a receiver. Then, the display image of the display unit of the electronic device can be reproduced by applying a simple signal processing method to the observation signal. For this reason, the necessity of examining the information leakage problem by this emitted electromagnetic signal is reported (refer nonpatent literature 1).

  Such display images are reproduced not only on the display screens of so-called computers such as PCs, but also on mobile phones and car navigation systems, as well as on televisions, ATMs (automated teller machines) such as banks, public institution terminals, and transportation facilities. There is a similar concern in all electronic devices having image display devices such as equal ticket machines.

  As described above, when TEMPEST is used, the display screen of the image display device included in the information device can be reproduced in a non-contact manner at a distance. For this reason, when personal information, confidential information, or the like is displayed on the display screen of the display device, the display information of the image display device may be stolen. Therefore, a countermeasure for preventing leakage of information in the display screen of the image display apparatus by TEMPEST is indispensable.

In addition, such leakage of information about display images is caused by forming a display image on the terminal device side based on information given from the server device to the terminal device via the network, and the display image is displayed on the display unit of the terminal device. It may also occur when displayed on the screen.
Hideki Sekiguchi, 3 others, “A Study on Reproduction of Display Images on PC Monitor Using Emission Electromagnetic Signals”, IEICE Technical Report, The Institute of Electronics, Information and Communication Engineers, November 14, 2005, ISEC 2005, No. 97 , P. 53-58

  Therefore, a problem to be solved by the present invention is that electromagnetic noise (when a display image formed based on information or the like given from the server device to the terminal device via the network is displayed on the display unit of the terminal device ( It is to provide an information processing system, an information processing method, a server apparatus, and related technologies capable of preventing leakage of information related to a display image due to an electromagnetic signal.

  In order to solve the above problems, an information processing system according to the invention of claim 1 includes a terminal device and a server device connected to the terminal device via a network, the terminal device including a display unit, A display control unit configured to form a display image based on transmission information given from the server device via the network and display the display image on the display unit, and the server device prepares the transmission information And an information preparation unit that provides the transmission information to the terminal device via the network, and a modification target image element defined by a character code or vector information included in the transmission information prepared by the information preparation unit. A modification processing unit that performs a modification process on the image processing unit. The modification process is a process of modifying a contour part of the image element to be modified, It is a process of replacing the image element to be modified with a previously prepared modified image element whose outline is modified, and the information preparation unit performs the modification process on the image element to be modified included in the transmission information. The transmission information after being applied is provided to the terminal device via the network.

  According to a second aspect of the present invention, in the information processing system according to the first aspect of the invention, the information preparation unit of the server device prepares web information related to a web page as the transmission information, and the web information is The communication protocol used for information communication between the server and the web client is used to give the terminal device via the network, and the display control unit of the terminal device is based on the web information given via the network. Then, an image of a web page is formed as the display image, and the image is displayed on the display unit.

  According to a third aspect of the present invention, in the information processing system according to the first or second aspect of the present invention, the terminal device further includes an operation unit that accepts an operation, and the display control unit of the terminal device includes: Input information received via the operation unit is given to the server device via the network, and the information preparation unit of the server device prepares the transmission information based on the input information given from the terminal device. To the terminal device via the network.

  According to a fourth aspect of the present invention, in the information processing system according to the first or second aspect of the present invention, the terminal device further includes an operation unit that receives an operation, and the display control unit displays on the display unit. When the input to the input area which is provided in the displayed image and to be modified is received through the operation unit, the image to the input area based on the input information input through the operation unit is received. Without displaying, the input information is given to the server device via the network, and an image is created based on the first modified information given from the server device in response to the input information. The modification processing unit of the server device performs the modification processing on the image element specified by the input information given from the terminal device, and displays the modification in the input area. Via the network information obtained by the process as the first modification completion information given to the terminal device.

  According to a fifth aspect of the present invention, in the information processing system according to the fourth aspect of the invention, the modification processing unit of the server device should be a modification target in the display image displayed on the terminal device. The input area is notified to the terminal device via the information preparation unit.

  According to a sixth aspect of the invention, in the information processing system according to the fourth or fifth aspect of the invention, the modification control unit of the terminal device displays the image displayed in the input area that is a modification target. In response to the erasure instruction, the server apparatus is notified of the erasure instruction via the network without updating the display content of the input area based on the erasure instruction and responding thereto. Updating the display content of the input area based on the second modified information given from the server device, and the modification processing unit of the server device is notified of the erasure instruction from the terminal device. In response, the information regarding the modified image to be displayed in the input area after reflecting the erasure instruction is created, and the network is used as the second modified information. And it applies the same to the terminal device.

  According to a seventh aspect of the present invention, in the information processing system according to any one of the fourth to sixth aspects, the display control unit is configured to display the image displayed in the input area to be modified. When a conversion instruction for instructing character conversion for a certain pre-conversion character is received via the operation unit, the conversion instruction is notified to the server apparatus via the network, and given in response to the server apparatus A candidate image corresponding to the conversion candidate character is created based on the third modified information, the candidate image is displayed on the display unit, and the modification processing unit of the server device receives the conversion instruction from the terminal device. In response to the notification, the character conversion is performed on the pre-conversion character, the modification process is performed on the conversion candidate character obtained by the character conversion, and the modification process is performed. Via the network information obtained I as the third modification completion information of given to the terminal device.

  According to an eighth aspect of the present invention, in the information processing system according to any one of the first to seventh aspects of the present invention, in the modification process performed by the modification processing unit of the server apparatus, A process of providing at least one modification part to the contour part, or the image element to be modified is prepared in advance and has been prepared with at least one modification part added to the contour part of the display image contour part At least one of the three attribute values including the hue, lightness, and saturation of the modification unit is processed corresponding to the image element to which the modification unit is assigned. The attribute value is gradually changed from the attribute value to the corresponding attribute value of the background image of the image element.

  According to a ninth aspect of the present invention, in the information processing system according to the eighth aspect of the invention, the modifying unit is at least one of the three attribute values in the horizontal direction that is the main scanning direction of the display unit. One attribute value is gradually changed.

  According to a tenth aspect of the present invention, in the information processing system according to the ninth aspect of the present invention, the modification unit is provided at a plurality of locations in a contour portion of the image element to be modified, and in the horizontal direction of the display unit. It has a substantially linear form extending along.

  According to an eleventh aspect of the present invention, in the information processing system according to any one of the first to seventh aspects, the image element to be modified extends in a horizontal direction that is a main scanning direction of the display section. In the modification process that includes a line segment and is performed by the modification processing unit of the server device, the line segment is provided with at least one modification unit extending in the horizontal direction, or the line segment is modified with the at least one modification. In the portion provided with the modified portion prepared in advance, the line segment is provided with three modified attributes including the hue, brightness, and saturation of the line segment. The attribute value of at least one of the values is gradually changed from the corresponding attribute value of the part where the modification part is not provided to the corresponding attribute value of the background image of the line segment. That.

  According to a twelfth aspect of the present invention, in the information processing system according to any one of the first to eleventh aspects, the modification processing unit of the server device applies the modification target image element after the modification processing. Corresponding bitmap data is created, and original information regarding the image element to be modified is replaced with the bitmap data.

  According to a thirteenth aspect of the present invention, in the information processing system according to any one of the first to eleventh aspects, the image element to be modified is defined by information relating to a character code and a font, and the server device In the modification processing unit, information on at least one type of modified font corresponding to the modified image element is registered in advance, and the modification processing unit stores information on the font of the image element to be modified. Replace with information on the modified font.

  According to a fourteenth aspect of the present invention, in the electronic device according to the thirteenth aspect of the present invention, the modification processing unit includes information on a plurality of types of modified fonts corresponding to the modified image elements. The modification processing unit registers a modified font associated with the font type of the image element to be modified from among the plurality of types of modified fonts. The data regarding the font of the image element to be modified is replaced with the data regarding the selected modified font.

  According to a fifteenth aspect of the present invention, in the information processing system according to the first or second aspect of the present invention, the terminal device includes an operation unit that accepts an operation and a modification given from the server device via the network. A modification control unit that performs, on behalf of the server device, at least a part of the modification process for the modification-target image element included in the display image to be displayed on the display unit based on a processing program; The display control unit of the terminal device causes the display unit to display the display image after the modification process on the image element to be modified by the modification control unit is performed. The program supply part which gives the said program to the said terminal device via the said network is further provided.

  According to a sixteenth aspect of the present invention, in the information processing system according to any one of the first to fifteenth aspects, the server device is constituted by a single information processing device.

  According to a seventeenth aspect of the present invention, in the information processing system according to any one of the first to fifteenth aspects, the server device includes a plurality of information processing devices.

  An information processing system according to an invention of claim 18 includes a terminal device and a server device connected to the terminal device via a network, the terminal device including a display unit and the network via the network. A display control unit that forms a display image based on transmission information provided from the server device and displays the display image on the display unit, and a program for modification processing provided from the server device via the network Based on a character code or vector information included in the display image, and a modification control unit that performs modification processing on an image element to be modified, and the server device prepares the transmission information and stores the transmission information. An information preparation unit to be given to the terminal device via the network, and the modification processing program via the network A program supply unit for giving to a terminal device, wherein the display control unit of the terminal device displays the display image after the modification processing on the image element to be modified by the modification control unit is performed on the display unit. The modification process is a process of modifying a contour part of the image element to be modified, or a modified image element prepared in advance with a modified contour part of the image element to be modified It is a process to replace.

  According to a nineteenth aspect of the present invention, there is provided an information processing method using a terminal device and a server device connected to the terminal device via a network, wherein the server device forms a display image on the terminal device. A step of preparing transmission information for processing, a step of performing a modification process on an image element to be modified defined by a character code or vector information included in the prepared transmission information by the server device, and the server Providing the transmission information to the terminal device via the network after the modification processing is performed on the image element to be modified included in the transmission information by the device; and the server device by the terminal device Forming the display image on the basis of the transmission information given from and displaying the display image on a display unit. The modification process is a process of modifying the contour part of the image element to be modified, or a process of replacing the image element to be modified with a previously prepared modified image element having a modified contour part. It is.

  The invention according to claim 20 is an information processing method using a terminal device and a server device connected to the terminal device via a network, wherein the server device forms a display image on the terminal device. Providing the terminal device with transmission information and modification processing program for forming the display image based on the transmission information provided from the server device by the terminal device, Performing a modification process on a modification-target image element defined by a character code or vector information included in the display image based on the modification process program given from the server apparatus; Display the display image after the modification process is performed on the image element to be modified on the display unit. The modification process is a process for modifying the contour portion of the image element to be modified, or a modified image prepared in advance whose contour portion has been modified. This is a process of replacing the image element.

  According to a twenty-first aspect of the present invention, there is provided a server device connected to a terminal device via a network, wherein transmission information for causing the terminal device to form a display image is prepared, and the transmission information is transmitted via the network. An information preparation unit provided to the terminal device, and a modification processing unit that performs modification processing on the image element to be modified defined by the character code or vector information included in the transmission information prepared by the information preparation unit, The modification process is a process for modifying the contour portion of the image element to be modified, or a modified image element prepared in advance whose contour portion is modified from the image element to be modified The information preparation unit converts the transmission information after the modification processing is performed on the image element to be modified included in the transmission information to the front. Via a network providing to the terminal device.

  According to a twenty-second aspect of the present invention, there is provided a program read by a computer connected to a terminal device via a network, wherein the program stores transmission information for causing the computer to form a display image on the terminal device. A procedure for performing a modification process on a modification target image element defined by a character code or vector information included in the prepared transmission information; and a modification target image element included in the transmission information. A step of giving the transmission information to the terminal device via the network after the modification process has been performed on the image processing apparatus, and the modification process involves modifying a contour portion of the image element to be modified Processing to be performed, or processing to replace the image element to be modified with a modified image element prepared in advance with the contour portion modified A.

  According to a twenty-third aspect of the present invention, there is provided a program that is read by a computer that constitutes the server device according to the twentieth aspect of the invention, and the program causes the computer to execute a process performed by the modification processing unit.

  According to the first aspect of the invention, the transmission process is performed after the modification process is performed on the modification-target image element defined by the character code or the vector information in the transmission information given from the server apparatus to the terminal apparatus. Information is given from the server device to the terminal device. In the modification process, a process for modifying the contour portion of the image element to be modified or a process for replacing the image element to be modified with a previously prepared modified image element in which the contour part is modified is performed. . In addition, an image element that should prevent leakage of information due to an electromagnetic signal can be set as the image element to be modified. Therefore, information on the display image due to electromagnetic noise (electromagnetic signal) when a display image formed based on information or the like given from the server device to the terminal device via the network is displayed on the display unit of the terminal device. Leakage can be prevented. For example, when personal information and confidential information are transmitted from a server device to a terminal device via a network and the information is displayed on the terminal device, the information is leaked by an electromagnetic signal emitted from the terminal device. Can be surely prevented.

  Further, since the modification process for the image element is performed by the server device, it is not necessary to provide the terminal device with a special configuration for modification process (for example, software for modification process). Therefore, the information processing system according to the present invention can be easily configured using a commonly used terminal device.

  Further, when the modification process is performed on the contour portion of the image element to be modified, the modification process can be performed on an arbitrary image element defined by the character code or the vector information.

  Further, as the modification process, when the process of replacing the image element to be modified with the modified image element prepared in advance whose contour portion has been modified is performed, the modification process is completed simply by replacing the image element. It is possible to reduce the load on the server device by the modification process and speed up the modification process.

  According to the second aspect of the present invention, when web information including information that should be prevented from leaking is displayed on the terminal device, the information that should be prevented from leaking is leaked by the electromagnetic signal that is released. Can be prevented.

  Also, transmission information given from the server device to the terminal device is given as web information. For this reason, as long as it is a terminal device which can browse a web page, the web information which performed the modification process with respect to the image element of a display image can be sent via a network with respect to arbitrary terminal devices.

  According to the third aspect of the present invention, when the server device sends transmission information prepared based on the input information given from the terminal device to the terminal device, the information contained in the transmission information is emitted from the electromagnetic signal. Can prevent leakage.

  According to the fourth aspect of the present invention, when an input is made to an input area that is provided in the display image of the terminal device and is to be modified, the input information is given to the server device. At this time, no image is displayed in the input area based on the input information. Then, the first modified information obtained by the modification processing by the server device with respect to the image element specified by the input information is given to the terminal device, and the terminal device moves to the input area based on the first modified information. The modified image elements are displayed. Therefore, it is possible to prevent information displayed in the input area from being leaked by an electromagnetic signal when a countermeasure against leakage is required in the input area in the display image displayed on the terminal device.

  According to the fifth aspect of the present invention, the input area to be modified in the display image displayed on the terminal device is designated on the server device side. For this reason, the input area in which information that needs countermeasures against information leakage may be input can be surely changed by an instruction from the server device, thereby important information input on the terminal device side. Etc. can be reliably prevented.

  According to the invention described in claim 6, when an instruction to erase part or all of the image displayed in the input area to be modified provided in the display image of the terminal device is given via the operation unit The deletion instruction is given to the server device. At this time, the display contents of the input area are not updated by the terminal device based on the erasure instruction. Then, based on the second modified information given from the server device to the terminal device in response thereto, the display content of the input area by the terminal device is updated. Therefore, the display content displayed in the input area to be modified in the display image of the terminal device can be reliably managed on the server device side.

  Further, it is convenient because it can cope with correction or erasure of information input to the input area to be modified on the terminal device side.

  According to the seventh aspect of the present invention, when the character conversion for the character input in the input area to be modified provided in the display image of the terminal device is instructed, the server device converts it as a conversion candidate. The modification process is performed on the candidate character. Then, the candidate image obtained by the modification process is displayed on the display unit by the terminal device. Therefore, even when conversion candidate characters at the time of character conversion are displayed on the display unit, modification processing can be performed on the conversion candidate characters, and more thorough measures are taken against leakage of information due to electromagnetic signals. be able to.

  According to the invention described in claim 8, at least one modification portion is given to the contour portion of the modified image element. Then, at least one of the three attribute values including the hue, lightness, and saturation of the modified portion is obtained from the corresponding attribute value of the image element to which the modified portion is assigned. It is gradually changed to the corresponding attribute value of the background image. Therefore, it is possible to effectively obscure the outline of the image element in a state in which it is difficult to restore the image element from the electromagnetic signal while suppressing deterioration in the visibility of the modified image element displayed on the display unit of the electronic device. As a result, even if an electromagnetic signal related to the image signal emitted from the electronic device is received by a third party, it is possible to prevent the image element subjected to the modification process from being restored from the received signal.

  According to the ninth aspect of the present invention, in the modification portion given to the contour portion of the modified image element, at least one of the above three attribute values in the horizontal direction that is the main scanning direction of the display portion. The attribute value is gradually changed. For this reason, in the image element that has been subjected to the modification process, the portion of the image signal corresponding to the contour portion of the image element can be effectively obscured so that it is difficult to recover from the electromagnetic signal. Can be more reliably prevented from being restored.

  According to the tenth aspect of the present invention, the modification portion given to the contour portion of the modified image element is given to a plurality of locations of the contour portion of the image element to be modified, along the horizontal direction of the display portion. It has a substantially linear form extending. Therefore, it is possible to effectively obscure the contour of the image element in a state in which it is difficult to restore it from the electromagnetic signal while suppressing deterioration in the visibility of the modified image element displayed on the display unit of the terminal device.

  According to the eleventh aspect of the present invention, at least one modification portion extending in the horizontal direction is given to the modified line segment extending in the horizontal direction. Then, at least one of the three attribute values including the hue, lightness, and saturation of the modified portion is changed from the corresponding attribute value of the portion where the modified portion of the line is not provided to the line. Are gradually changed to corresponding attribute values of the background image. Therefore, it is possible to effectively obscure the image of the line segment in a state in which it is difficult to recover the image from the electromagnetic signal while suppressing deterioration in the visibility of the modified line segment displayed on the display unit of the electronic device. As a result, even if an electromagnetic signal related to the image signal emitted from the electronic device is received by a third party, it is possible to prevent the line segment subjected to the modification process from being restored from the received signal.

  According to the invention described in claim 12, since the bitmap data corresponding to the image element after the modification process is created by the modification process, the modification process is performed on an arbitrary image element defined by the character code or the vector information. Yes.

  According to the thirteenth aspect of the present invention, information related to at least one type of modified font corresponding to the modified image element is registered in advance in the modification processing unit of the server device. In the modification process, information regarding the font of the image element to be modified is replaced with information regarding the modified font. Therefore, since the modification process is completed only by replacing the font, it is possible to reduce the load on the server device by the modification process and speed up the modification process.

  According to the invention described in claim 14, a plurality of types of modified fonts are prepared in advance, and the plurality of types of modified fonts are selectively used according to the font type of the image element to be modified. Therefore, the font used for the modified image element can be the same or similar to the font type of the image element before modification, and the modification process changes the font of the image element to a completely different font. It is possible to avoid inconveniences such as

  According to the fifteenth aspect of the present invention, at least part of the modification process can be performed by the terminal device instead of the server device, thereby reducing the load on the server device.

  Further, since the modification processing program used for the terminal device to execute the modification processing is automatically supplied from the server device, it is not necessary to prepare in advance on the terminal device side. Therefore, the information processing system according to the present invention can be easily configured using a commonly used terminal device.

  According to invention of Claim 16, a server apparatus can be comprised by the single information processing apparatus.

  According to the invention described in claim 17, a server apparatus can be configured by linking a plurality of information processing apparatuses. For example, modification processing can also be performed by a single information processing device on transmission information given from a plurality of information processing devices. In this case, there is an advantage that a program or the like necessary for the modification process may be installed in a single information processing apparatus.

  According to the invention described in claim 18, of the transmission information given from the server device to the terminal device, the modification processing is performed by the terminal device on the modification target image element defined by the character code or vector information. . Then, a display image formed based on the transmission information after the modification process is displayed by the terminal device. In the modification process, a process for modifying the contour portion of the image element to be modified or a process for replacing the image element to be modified with a previously prepared modified image element in which the contour part is modified is performed. . In addition, an image element that should prevent leakage of information due to an electromagnetic signal can be set as the image element to be modified. Therefore, information on the display image due to electromagnetic noise (electromagnetic signal) when a display image formed based on information or the like given from the server device to the terminal device via the network is displayed on the display unit of the terminal device. Leakage can be prevented. For example, when personal information and confidential information are transmitted from a server device to a terminal device via a network and the information is displayed on the terminal device, the information is leaked by an electromagnetic signal emitted from the terminal device. Can be surely prevented.

  In addition, since a program for modification processing for executing modification processing is given from the server device to the terminal device, a special configuration for modification processing (for example, software for modification processing) is prepared in advance in the terminal device. There is no need to do. Therefore, the information processing system according to the present invention can be easily configured using a commonly used terminal device.

  Further, since the modification process is performed on the terminal device side, the processing load on the server apparatus can be reduced.

  Further, when the modification process is performed on the contour portion of the image element to be modified, the modification process can be performed on an arbitrary image element defined by the character code or the vector information.

  Further, as the modification process, when the process of replacing the image element to be modified with the modified image element prepared in advance whose contour portion has been modified is performed, the modification process is completed simply by replacing the image element. The load on the terminal device can be reduced by the modification process, and the modification process can be speeded up.

  According to the nineteenth aspect, substantially the same effect as the first aspect can be obtained.

  According to the twentieth aspect of the invention, the substantially same effect as that of the eighteenth aspect of the invention can be obtained.

  According to the invention described in claim 21, the transmission process is performed after the modification process is performed on the modification-target image element defined by the character code or the vector information among the transmission information given from the server apparatus to the terminal apparatus. Information is given from the server device to the terminal device. In the modification process, a process for modifying the contour portion of the image element to be modified or a process for replacing the image element to be modified with a previously prepared modified image element in which the contour part is modified is performed. . In addition, an image element that should prevent leakage of information due to an electromagnetic signal can be set as the image element to be modified. Therefore, information on the display image due to electromagnetic noise (electromagnetic signal) when a display image formed based on information or the like given from the server device to the terminal device via the network is displayed on the display unit of the terminal device. Leakage can be prevented. For example, when personal information and confidential information are transmitted from a server device to a terminal device via a network and the information is displayed on the terminal device, the information is leaked by an electromagnetic signal emitted from the terminal device. Can be surely prevented.

  Further, since the modification process for the image element is performed by the server device, it is not necessary to provide the terminal device with a special configuration for modification process (for example, software for modification process). Therefore, transmission information can be sent from the server device according to the present invention to a terminal device that is generally used.

  Further, when the modification process is performed on the contour portion of the image element to be modified, the modification process can be performed on an arbitrary image element defined by the character code or the vector information.

  Further, as the modification process, when the process of replacing the image element to be modified with the modified image element prepared in advance whose contour portion has been modified is performed, the modification process is completed simply by replacing the image element. It is possible to reduce the load on the server device by the modification process and speed up the modification process.

  According to the twenty-second aspect, substantially the same effect as the twenty-first aspect can be obtained.

  According to the twenty-third aspect of the present invention, it is possible to cause various computers to perform modification processing by causing a computer to read the program according to the present invention.

[First Embodiment]
FIG. 1 is a diagram schematically showing a configuration of an information processing system according to the first embodiment of the present invention, FIG. 2 is a block diagram of a terminal device provided in the information processing system, and FIG. It is a block diagram of the server apparatus with which a system is equipped.

  As illustrated in FIG. 1, the information processing system 100 according to the present embodiment includes at least one terminal device 10 and a server device 20 connected to the terminal device 10 via a network 30. The network 30 is configured by a wide area network such as the Internet, a LAN (Local Area Network), or a combination thereof.

  As shown in FIG. 2, the terminal device 10 includes a control unit 11, a ROM (Read Only Memory) 12, a RAM (Random Access Memory) 13, a storage unit 14, a display unit 15, an operation unit 16, and a communication unit 17. ing. As the terminal device 10, any information terminal can be used as long as it includes the display unit 15 and can be connected to the network 30. Specific examples include PCs, mobile phone terminals, PDAs (Personal Digital Assistants), and the like. Other examples include ATMs installed at convenience stores and bank branches.

  The control unit 11 supervises control of the terminal device 10 and includes a CPU (Central Processing Unit) and the like. The control unit 21 includes a display control unit 11a as a functional element. The display control unit 11 a forms a display image based on transmission information given from the server device 20 via the network 30 and causes the display unit 15 to display the display image. Here, the functional elements such as the display control unit 11a and the information preparation unit 21a provided in the control unit 11 and the control unit 21 of the server device 20 described later are defined by one or a plurality of software read by the control units 11 and 21. Refers to the function to be realized.

  The ROM 12 stores basic programs executed by the control unit 11 for information processing, setting data, and the like. The RAM 13 is used as a work area for the control unit 11 to perform information processing. The storage unit 14 is configured by a storage device that can rewrite storage contents, such as a hard disk device or a large-capacity semiconductor memory, and is used as a storage location of information. The storage unit 14 also stores information on the operating system and various application software. The display unit 15 is configured by a liquid crystal display device or the like, and displays an image given by an image signal. The operation unit 16 includes a keyboard and a mouse, and accepts user operations. The communication unit 17 is an interface for the terminal device 10 to perform information communication via the network 30.

  As shown in FIG. 3, the server device 20 includes a control unit 21, a ROM 22, a RAM 23, a storage unit 24, and a communication unit 25. The configuration illustrated in FIG. 3 is an example, and the server device 20 may include a display unit, an operation unit, and the like.

  The control unit 21 controls the server device 20 and includes a CPU (Central Processing Unit) and the like. The control unit 21 includes an information preparation unit 21a and a modification processing unit 21b as functional elements. The role of these functional elements will be described later. The ROM 22 stores basic programs executed by the control unit 21 for information processing, setting data, and the like. The RAM 23 is used as a work area for the control unit 21 to perform information processing. The storage unit 24 is configured by a storage device such as a hard disk device that can rewrite stored contents, and is used as a storage location for information. The storage unit 24 also stores information related to the operating system and various application software. The communication unit 25 is an interface for the server device 20 to perform information communication via the network 30.

  The information preparation unit 21 a of the control unit 21 prepares the transmission information to be given to the terminal device 10 and gives the transmission information to the terminal device 10 via the communication unit 17 and the network 30. The modification processing unit 21b performs modification processing on the modification-target image element defined by the character code or vector information included in the transmission information prepared by the information preparation unit 21a. For example, the modification process is a process for modifying the contour portion of the image element to be modified. This modification processing is performed by the electromagnetic noise (when the display image formed based on the information given from the server device 20 to the terminal device 10 via the network 30 is displayed on the display unit 15 of the terminal device 10 ( This is for preventing leakage of information related to the display image due to electromagnetic signals.

  The modification process will be described in more detail. Here, based on transmission information given from the server device 20 to the terminal device 10, an example is shown in which the character 1 "A" defined by the character code is displayed on the display unit 15 as shown in FIG. To explain.

  FIG. 5A is a diagram illustrating an image of the character 1 “A”, which is an example of an image element to be modified, and FIG. 5B is a diagram illustrating an image after the modification processing of the character 1 It is. FIG. 6 is an enlarged view of the lower part of FIG. Since the image of the character 1 to be modified is subjected to the modification process and then displayed on the display unit 15 as the image of the character 2 at the modified corner, the image of the character 1 in FIG. Will not be displayed.

  Here, in the present invention, the entire image displayed on the display screen 15a of the display unit 15 is referred to as a display image. Among the displayed images, the modification process is performed on the modification target image element defined by the character code or the vector information. In addition, a portion that is the background of the image element to be modified in the display image is referred to as a background image. The image element defined by the character code is a concept that includes all image elements such as characters, symbols, and graphics to which the character code is assigned. Specific examples thereof include kanji, hiragana, katakana, numbers, alphabets, romaji, and characters used in other languages. The image element defined by the vector information is a concept including all image elements such as characters, symbols, and figures described as vector information. In the present invention, an arbitrary image element defined by a character code or vector information can be subjected to modification processing according to the necessity of information leakage countermeasures. For example, the modification process may be applied not only to still images but also to moving images.

  The image of the character 1 shown in FIG. 5A is displayed in one of fonts generally used on a display screen such as a PC. For example, character 1 is black and the background of the image of character 1 is white. The modified image of the character 2 shown in FIG. 5B is obtained by adding a plurality of modification portions 3 (“beard”) to the contour portion of the image of the character 1 by modification processing. Note that the portion other than the modification portion 3 (the main body portion of the character 2 image) 2a in the modified character 2 image is black.

  The modification unit 3 extends linearly along the horizontal direction H from at least one side (for example, both sides) of both sides in the horizontal direction H in the contour portion of the main body portion 2 a of the character 2. Here, the horizontal direction H is a direction parallel to the main scanning direction of the display screen 15 a of the display unit 15. Note that the direction of the horizontal direction H changes according to the installation state of the display unit 15. For example, as shown in FIG. 2, when the display unit 15 is installed in a normal orientation, the horizontal direction H is the left-right direction (lateral direction) as viewed from the viewer. However, when the display unit 15 is arranged in a state rotated 90 degrees from the state of FIG. 2, the horizontal direction H is the vertical direction (vertical direction) when viewed from the viewer.

  Moreover, the modification part 3 is provided in several places at intervals about the perpendicular direction V in the outline part of the main-body part 2a of the character 2. FIG. Here, the vertical direction V is a direction parallel to the sub-scanning direction of the display screen 15 a of the display unit 15. As a modification, the modification unit 3 may be provided without a gap in the vertical direction V in the outline of the main body portion 2a of the character 2.

  Further, as shown in FIG. 6, the width 6 of the modified portion 3 along the horizontal direction 6, the width 5 of the modified portion 3 along the vertical direction V, and the interval 4 between the modified portions 3 along the vertical direction V. Can be freely changed individually by changing the setting data.

  The modification unit 3 is divided into first to third gray regions 116 to 118 in order from the side closer to the main part 2a of the image of the modified character 2. The first gray area 116 is displayed in the gray closest to black, the third gray area 118 is displayed in the gray closest to white, and the second gray area 117 is defined as the first gray area 116. It is displayed in the middle gray of the third gray area 118. In this way, as the modification unit 3 moves away from the main body portion 2a in the horizontal direction H, at least one attribute value (for example, lightness) of the three attribute values of hue, saturation, and lightness in the Munsell color specification method is gradually increased. It has changed. Thereby, gradation is formed in the modification part 3. That is, the modification part 3 can also be called a gradation part. Here, in the present invention, “gradation” refers to an expression in which one of the two different brightness values is set as one end, the other brightness is set as the other end, and the brightness changes stepwise between both ends. The greater the number of changes per unit pixel on the screen when the brightness is changed in stages, the smoother the gradation changes. As gradation to be applied to the modification unit 3, any one or all of the above three attribute values other than lightness or any two or all of the three attribute values are changed in stages. Also good.

  7A is a diagram showing an RGB signal for one line along the horizontal line 8 in FIG. 5A, and FIG. 7B is one line along the horizontal line 9 in FIG. 5B. It is a figure which shows the RGB signal of a minute. In FIG. 7A and FIG. 7B, the horizontal axis indicates the passage of time, and the vertical axis indicates the voltage value.

  The horizontal line 8 in FIG. 5A is a line for scanning the background image portion (white portion) and the character 1 image portion (black portion). For this reason, in FIG. 7A, which is the measurement result of the RGB signal of the line 8, the portion where the voltage value of the RGB signal is low is black, and the portion where the voltage value is high is white.

  A horizontal line 9 in FIG. 5B is a line for scanning the background image portion (white portion), the main body portion 2 a of the character 2 image, and the revision portion 3. For this reason, in FIG. 7B, which is the measurement result of the RGB signal of the line 9, the lowest voltage value of the RGB signal is black, the second lowest is the first gray region 116, and the middle is the first. The second gray area 117, the second highest area is the third gray area 118, and the highest area is white.

  FIG. 8A is a diagram showing the measurement result of the electromagnetic signal emitted by the RGB signal of FIG. 7A, and FIG. 8B is the electromagnetic signal emitted by the RGB signal of FIG. 7B. It is a figure which shows a measurement result. 8A and 8B, the horizontal axis indicates the number of pixels on the horizontal lines 8 and 9 on the display screen, and the vertical axis indicates the voltage value of the emitted electromagnetic signal.

  In FIG. 8A, an electromagnetic signal having a voltage value exceeding 1 mV is emitted. In FIG. 5A, the boundary between the low and high voltage values of the RGB signal, that is, black and white. Is the boundary.

  On the other hand, in FIG. 8B, an electromagnetic signal having a voltage value exceeding 1 mV is not emitted. That is, an electromagnetic signal having a level exceeding 1 mV shown in FIG. 8A is obtained when the brightness change of the image from the white portion to the black portion is smooth as shown in FIG. 5B. So that it cannot be observed.

  Thus, if the electromagnetic signal emitted based on the image signal corresponding to the contour of the modified character 2 is reduced to a level where it can hardly be observed, the image of the character 2 is restored from the observation result of the emitted electromagnetic signal. I can't. As a result, it is possible to prevent information relating to the character 2 from leaking from the electromagnetic signal emitted based on the image signal of the character 2.

  Therefore, by applying the modification process as described above to the image element to be modified, it is possible to reliably prevent leakage of information regarding the image element from the electromagnetic signal emitted based on the image signal of the image element.

  Here, it is preferable that the gradation applied to the modification unit 3 described above changes linearly (in other words, linearly (linearly)) in a plurality of stages. When gradation changes linearly in this way, calculation processing can be performed with only a linear function, so that the processing amount is relatively small, and calculation processing can be promoted to rapidly modify many image elements. Then, by suppressing the amount of calculation processing, the modification processing can be realized only by software without providing special additional hardware for calculation processing. Therefore, it is possible to make various information processing apparatuses perform the modification process without requiring a special apparatus.

  FIG. 9 is a schematic diagram showing a case where the horizontal width of a region to which gradation is applied is changed. (A) shows a case where the width is narrow, and (b) shows a case where the width is wide. Here, the case where the image element to be modified is 100% black and the background image is 0% black (white) will be described as an example. In FIG. 9A, gradation is applied by inserting one intermediate level dot between 100% black dots and 0% black dots. Further, in FIG. 9A, gradation is applied by inserting three intermediate level dots that change in stages between 100% black dots and 0% black dots. As shown in FIG. 9A, when the gradation change rate is as high as 50%, the horizontal width of the region to which the gradation is applied is narrow. On the other hand, when the gradation change rate is lowered to 25% as shown in FIG. 9B, the horizontal width of the area to which the gradation is applied becomes wider.

  Thus, the change rate of gradation can be changed by changing the horizontal width in the modification unit 3 to which gradation is applied. This makes it possible to adjust the balance between the difficulty of intercepting the image element after the modification processing by the electromagnetic signal and the visibility of the image element. That is, if the horizontal width of the modification unit 3 is widened to reduce the gradation change rate, it can be made difficult to intercept, but it is difficult to see as an image. On the other hand, if the width is narrowed and the gradation change rate is increased, it becomes easier to see, but it is easier to intercept.

  Further, the modification unit 3 may be formed so as to connect the image element to be modified in the display image and the background image with a gradation having a constant change rate. In this case, the width of the modification unit 3 in the horizontal direction is increased according to the size of the contrast between the image element to be modified and the background image. For example, when an image of a character is displayed on the display screen, if the horizontal width of the modification unit 3 increases, the modification units 3 may overlap between adjacent characters. In such a case, the modification unit 3 may be added after reducing the contrast between the character and the background in advance. As a method of reducing the difference in brightness between the image element to be modified such as a character and the background image, for example, when the character is 100% black and the background is 0% (white), the character is changed to gray of 50% black. Another method is to reduce the contrast between the character and the background.

  Note that the method of modifying (modifying) image elements such as characters is not limited to the method of adding a modified portion (whisker) as long as the emitted electromagnetic signal can be reduced to an almost unobservable level. For example, the modification portion may be added so as to surround the entire periphery of the main body portion (unmodified portion) of the image element to be modified, or to partially surround the periphery of the main body portion. In this method, the electromagnetic signal emitted can be reduced more reliably and the image can be made harder to estimate than the method of providing the beard-like modified portion.

  Further, for example, a plurality of dots may be further added around the beard-shaped modification portion 3 described above. As a result, a higher blinding effect can be obtained, and the image can be made more difficult to estimate.

  In the above, the method for preventing the image displayed on the screen from being estimated by reducing the electromagnetic signal emitted based on the image signal has been described. However, if the image displayed on the screen cannot be estimated as a result, there is no need to stick to reducing the electromagnetic signal.

  The above-described beard-shaped modification unit 3 may be configured with one or a plurality of different colors such as red, yellow, blue, red, and green. In this case, you may change the color of each part of the modification part 3 at random. Or you may comprise the modification part 3 only by single intermediate | middle lightness (for example, gray of black 70%). In this case, the brightness of the modification part 3 is changed randomly for each modification part 3 such that the brightness of one modification part 3 is gray of 70% black and the brightness of another modification part 3 is gray of 30% black. You may let them.

  FIG. 10A is a diagram showing an image of a line segment before modification, and FIG. 10B is a diagram showing an image of a line segment after modification. In this way, a line segment extending in the horizontal direction H may be set as the image element to be modified. In the modification process in this case, at least one modification part extending in the horizontal direction H is provided in the line segment.

  For example, as shown in FIG. 10A, a specific example of the modification process in a case where the line segment 201 before modification is continuous in the horizontal direction H with a brightness of 100% black as a background of black 0% (white). Will be explained. In this case, as shown in FIG. 10B, the modification sections 203 are provided at a plurality of locations on the line segment 202. In the modification unit 203, in the portion where the modification unit 203 of the line segment 202 is provided, as the brightness of the line segment 202 progresses in the horizontal direction H, the background from the 100% black that is the brightness of the original line segment 201. The brightness is gradually changed between 0% and black. In the example of FIG. 10B, as the modification unit 203 proceeds in the horizontal direction H, the brightness is 75% black, 50% black, 25% black, 0% black, 25% black, 50% black, and 75 black. It is changed in stages in the order of%. More specifically, in the example of FIG. 10B, the entire line segment 202 after modification is the modification unit 203 whose brightness changes periodically. As the brightness of the line segment 202 advances in the horizontal direction H, black 100%, black 75%, black 50%, black 25%, black 0%, black 25%, black 50%, black 75%, black 100 %, Black 75%,... Are changed stepwise and periodically.

  The number of modification sections 203 provided in the line segment 202 is adjusted according to the horizontal width H of the line segment 201 before modification, the horizontal width H of the modification section 203, and the like. For example, when the width in the horizontal direction H of the line segment 201 before modification is small, one modification unit 203 may be provided.

  Here, the line segment to be modified includes a horizontal “H” character such as a Chinese character “1”, a katakana long sound character “-”, a hyphen symbol or a subtraction symbol “-”, and a ruled line or straight line extending in the horizontal direction H Various image elements extending linearly along are included.

  The modification process as described above is performed based on setting data that defines the content of the modification process stored in the storage unit 24 or the like. The contents of the prescribed data will be specifically described by taking as an example a case where modification processing is performed on a character image (font image) given by a character code. The setting data is, for example, converted into a data file and stored in the storage unit 24 or the like, and is read out by the modification processing unit 22b and used for the modification process during the modification process.

  Examples of specified contents by setting data include <target font>, <number of target pt>, <vertical interval of modified portion>, <vertical width of modified portion>, <horizontal width of modified portion> , <Width of unmodified portion> and the like. <Target font> indicates a font to be modified among fonts used in a normal PC or the like. In this case, all fonts may be subject to modification, or some fonts may be excluded from alteration targets.

  <Number of target pt> indicates a font size to be modified, and indicates that it is a modification target if it is equal to or larger than the font size described here. If the font size is larger than a certain font size, for example, a font size smaller than about 16 pt (points) is unlikely to generate an electromagnetic signal that can reproduce the display image. It is.

  <Vertical spacing of the modified portion> defines the interval 4 in the vertical direction V between adjacent modified portions 3 on the display screen shown in FIG. 6, and the interval 4 is defined by the value described here. Is done. <Vertical width of the modified portion> defines the vertical width 5 of the modified portion 3 on the display screen shown in FIG. 6, and the width 5 is defined by the value described here. <Width in the horizontal direction of the modified portion> is for defining the width 6 in the horizontal direction H of the modified portion 3 on the display screen shown in FIG. 6, and the width 6 is defined by the value described here. The <Width of unmodified part> is for defining the width 7 in the horizontal direction H of the main body part 2a (unmodified part) of the image element to which the modification part 3 on the display screen shown in FIG. When the width 7 of the main body portion 2a is equal to or larger than the value described here, the modifying unit 3 is added. If the width 7 of the main body portion 2a is not greater than or equal to a predetermined value, the modification portion 3 is not provided because if the width 7 of the main body portion 2a is equal to or smaller than the predetermined value, a clear electromagnetic signal is unlikely to appear. It is because the meaning to attach is scarce.

  Note that <number of target pt>, <interval in the vertical direction of the modified portion>, and the like can be set to different values depending on <target font>.

  The information preparation unit 21a of the server device 20 prepares, for example, web information relating to a web page as the transmission information, and the web information is transmitted to the network 30 using a communication protocol used for information communication between the web server and the web client. Via the terminal device 10. As the communication protocol, for example, HTTP (HyperText Transfer Protocol), HTTPS (Hypertext Transfer Protocol Security), or Gopher protocol is used. On the other hand, the display control unit 11a of the terminal device 10 forms an image of a web page as a display image based on the web information given through the network 30 and causes the display unit 15 to display the image.

  For this reason, when the web information including the information that should be prevented from being leaked is displayed on the terminal device 10, it is possible to prevent the information that should be prevented from being leaked from being leaked by the electromagnetic signal that is released.

  Further, transmission information given from the server device 20 to the terminal device 10 is given as web information. For this reason, if the terminal device 10 is capable of browsing a web page, the web information obtained by performing the modification process on the image element of the display image is sent from the server device 20 to the arbitrary terminal device 10 via the network 30. be able to.

  In the above example, the web information is transmitted from the server device 20 to the terminal device 10, but the transmission information to be transmitted is not limited to the web information. For example, electronic mail and various document information may be transmitted as transmission information. Also in this case, by performing the above-described modification processing on the image element included in the transmission information, when the terminal device 10 displays the image related to the transmission information, the important information included in the display image is an electromagnetic signal. Can prevent leakage.

  Here, a modification process when a bitmap font system called a font system is employed will be described. In this case, since the image element to be modified is defined by the character code (including data related to the font), an image element such as a bitmap-format character is once generated based on the character code. Then, modification processing is performed on the bitmap format image element. The image element after the modification process is described as bitmap data, and is given from the server device 20 to the terminal device 10 together with other transmission information. A form such as a character image after the modification process described by the bitmap data is referred to as a “Cryp type font”. By this modification process, information regarding the character code corresponding to the image element to be modified in the transmission information is replaced with the bitmap data of the image element after the modification process.

  Next, a description will be given of modification processing when a so-called outline font system is adopted as the font system and the image element to be modified is defined by vector information. In this case, there can be two methods for the modification process. One is a method of generating an image element to be modified in a bitmap format from vector information of an outline font, and performing modification processing on the generated image element. The other is a method of converting an outline font into a bitmap after adding a modification portion based on the vector information. Note that, in the latter method, if the method of attaching the modification part corresponding to the vector information is described as the content of the setting data that defines the modification process, the modification part can be efficiently given by effectively using the vector information. .

  FIG. 11 is a schematic diagram for explaining how to attach a modification unit using vector information. The vectors α, β, and γ indicate the directions of the lines constituting the character “A” with reference to the x-axis and the y-axis. The x axis corresponds to the scanning line direction. Since the vertical direction and the horizontal direction in the description of the setting data defining the modification process correspond to the y-axis direction and the x-axis direction, respectively, the position where the modification part is added can be easily grasped from the vector direction. In particular, according to the vector information, it can be understood that the vector γ coincides with the x-axis direction. Therefore, it is possible not to add a modification unit to the vector γ. This is because, in the line portion (line segment) coinciding with the x-axis direction, the voltage value change of the RGB signal does not appear, and the emitted electromagnetic signal is also weak, so that it is not meaningful to add the modification portion. .

  It should be noted that the relatively long line segment that coincides with the x-axis direction generates an electromagnetic signal that reproduces the image itself, so that it is preferable to perform modification processing by the method shown in FIG. .

  Up to this point, the case of modifying a font character has been described as an example of modification processing, but it is also possible to modify a drawing line such as a straight line or a circle other than the font character in the same manner. Also, the method of modifying fonts and drawing lines is explained as the modification processing method, and various modifications such as a method of modifying a bitmap and a method of using outline font vector information as a concrete font modification method Explained the method. In addition, in these changing methods, it has also been described that various modification parameters such as the number of points of the character to be modified and the horizontal width of the modified portion are set.

  These modification methods and modification parameters need not be uniformly applied to the modification target image element. Rather, a different one for each image element to be modified or for each part in the image element may be irregularly applied. As a result, it is possible to make it difficult to estimate an image before modification. Specifically, for example, the parameter value for modification may be changed depending on the complexity of the character (for example, the number of strokes (number of strokes)). In other words, “difficulty” is more complicated for kanji “difficult” and hiragana “shi”, and it is difficult to estimate even before modification. For this reason, it is not necessary to add a modification part at the same interval as “shi” for complicated characters such as “difficult”.

  On the other hand, on the terminal device 10 side, the display control unit 11a generates a modified image element based on the bitmap data given from the server device 20, and causes the display unit 15 to display the image element. The character code and vector information other than the modification target included in the transmission information are given from the server device 20 to the terminal device 10 as they are. The control unit 22 of the terminal device 10 forms an image element based on the character code and vector information included in the transmission information, and causes the display unit 15 to display the image element. An image element given by information (for example, bitmap data) other than the character code and vector information in the transmission information is sent from the server device 20 to the terminal device 10 as it is without being changed.

  In the above configuration, the modification process is performed on the image element specified by the character code or the vector information, thereby generating bitmap data corresponding to the modified image element. For this reason, there is an advantage that modification processing can be performed on an arbitrary image element defined by a character code or vector information.

  Here, in the above modification process, for the image element that has been modified once, information about the modified image element (for example, bitmap data of the modified image element) is stored, and the stored information May be used for subsequent processing. In this case, for example, when the modification process is performed on the same image element, information on the modification-target image element (information on the character code or the like) is replaced with the saved bitmap data representing the modified image element. As a result, the speed and efficiency of the modification process can be improved.

  The storage information is stored using a storage area for primary storage (for example, a cache area). Also, in order to reduce the amount of stored information, priorities are set for stored information when the storage area for primary storage is full or when stored information is no longer used. Alternatively, the items may be deleted in descending order of priority. In this case, a so-called Garbage Collection method is used.

  FIG. 12 is a flowchart showing operations of the terminal device and the server device in the present embodiment, and FIG. 13 is a flowchart showing in detail operations related to the modification processing by the server device.

  As illustrated in FIG. 12, when an operation that prompts the server device 20 to transmit transmission information is performed on the operation unit 16 of the terminal device 10, the operation is accepted by the display control unit 11 a. Then, operation information related to the operation is sent to the server device 20 via the network 30 by the display control unit 11a (step S11).

  Various contents of the operation information can be considered. For example, information for specifying a web page to be called and information for specifying a document file to be called via a link in the web page or the like can be mentioned. As another example, the information preparation unit 21 a of the server device 20 may provide various services such as information processing, information management, and groupware to the terminal device 10 via the network 30. In this case, the operation information includes information related to the service of the server device 20. As the information processing service and the information management service, any service can be applied as long as it is a service provided to the terminal device 10 by the server device 20 via the network 30.

  For example, a service that provides a document creation function (word processing function), a service that provides a function related to creation, transmission, and reception of an e-mail, an information search service in the web, a service that provides a function for schedule management, and so-called Services related to web banking. Still other examples include services provided for depositing, withdrawing, and transferring money through ATMs (terminal devices 10) installed at convenience stores and bank branches.

  The information preparation unit 21a of the server device 20 prepares transmission information based on the operation information given from the terminal device 10 (step S21). Various types of transmission information are conceivable depending on the service provided to the terminal device 10 by the information preparation unit 21a.

  Subsequently, the modification processing unit 21b of the server device 20 performs modification processing on the image element to be modified included in the transmission information prepared by the information preparation unit 21a (step S22).

  In the process of step S22, as shown in FIG. 13, the modification processing unit 21b first determines whether or not the image element to be modified is included in the transmission information (step S22a). This determination is made based on whether or not modification instruction information (command) for invoking modification processing by the modification processing unit 21b is set in the transmission information. The modification instruction information may be automatically given to a portion to be modified in the transmission information when the information preparation unit 21a prepares the transmission information based on preset setting information. Alternatively, modification instruction information may be set in advance in an information element constituting transmission information.

  If the result of determination in step S22a is that modification instruction information is set in the transmission information, a hook for modification processing is set, and the process proceeds to step S22b, where modification instruction information is not set In step S23 of FIG. 12, the hook setting and modification processing is not performed.

  Here, the hook means that when a specific API (Application Program Interface) or function is executing control, the control of the specific API or function is intercepted by another API or function and executed instead. Is a thing. When control by another API or function called by the hook is finished, control is returned to the original API or function. In the present embodiment, by setting the hook, for example, the control of the API that controls the information preparation unit 21a is intercepted by the API that controls the modification processing unit 21b. . Alternatively, as a modification regarding this point, the control unit 21 may cause an external program for modification processing (a program called a filter) to perform modification processing.

  In step S22b, for example, it is determined whether or not the size of the character or the like to be modified is 16 pt or more, for example. After the modification part is assigned as described above, the process proceeds to step S23 in FIG. If it is less than 16 pt, the process proceeds to step S23 in FIG.

  In step S <b> 23, the information preparation unit 21 a of the server device 20 transmits the transmission information subjected to the modification processing by the modification processing unit 21 b to the terminal device 10 via the network 30.

  Following this, the display control unit 11a of the terminal device 10 forms a display image based on the transmission information given from the server device 20 via the network 30, and displays the display image on the display unit 15 (step S13). ). At this time, for the image element subjected to the modification process in the transmission information, a modified image element is generated based on the bitmap data, and the image element is displayed on the display unit 15. In addition, for image elements other than the modification target included in the transmission information, an image element (for example, an image of a character expressed in a normal font) is generated based on an information element such as a character code that defines the image element. Then, the generated image element is displayed on the display unit 15.

  Here, the modification processing unit 21 b of the server device 20 is a functional element (processing module) generated in the control unit 21 by a program (software) installed in the server device 20. For this reason, by installing the program, various computers can have the function of the server device 20 according to the present embodiment. The program is read into the server device 20 when it is read from a recording medium such as a CDROM (Compact Disk Read Only Memory) by a reading device (not shown) of the server device 20 or when it is read via the network 30. is there. The read program is stored in the storage unit 24 or the like.

  As described above, according to the present embodiment, the above-described modification process is performed on the modification target image element. Thereby, electromagnetic noise (electromagnetic signal) when a display image formed on the display unit 15 of the terminal device 10 is displayed based on information or the like given from the server device 20 to the terminal device 10 via the network 30. It is possible to prevent leakage of information related to the display image. For example, when personal information and confidential information are transmitted from the server device 20 to the terminal device 10 via the network 30 and the information is displayed on the terminal device 10, the information is released from the terminal device 10. It is possible to reliably prevent leakage due to electromagnetic signals.

  In addition, since the modification processing for the image element is performed by the server device 20, it is not necessary to provide the terminal device 10 with a special configuration for modification processing (for example, software for modification processing). Therefore, the information processing system 10 according to the present embodiment can be easily configured using the terminal device 10 that is generally used.

  Further, as described above, by adding one or more modification units to the image element to be modified, while suppressing deterioration in the visibility of the modified image element displayed on the display unit 15 of the terminal device 10. The image element can be effectively obscured in a state where it is difficult to recover from the electromagnetic signal. As a result, even if an electromagnetic signal related to the image signal emitted from the terminal device 10 is received by a third party, it is possible to prevent the image element subjected to the modification process from being restored from the received signal.

[Second Embodiment]
Next, an information processing system 100 according to the second embodiment of the present invention will be described. Since the information processing system 100 according to the present embodiment has substantially the same configuration as that of the information processing system 100 according to the first embodiment described above, description regarding common parts is omitted.

  Here, in a display image such as a web screen displayed by the information terminal, information such as characters may be input to an input area provided in the display image via an operation unit of the information terminal. In such a case, in an information terminal such as a normal PC, when information is input to the input area via the operation unit, information such as the input character is displayed immediately on the input area. It has become. Since characters and the like displayed in the input area are displayed in a normal font that has not been subjected to modification processing, there is a possibility that information relating to the input characters and the like may be leaked by electromagnetic signals.

  Therefore, in the present embodiment, measures are taken when an input area is provided in a display image such as a web screen of the terminal device 10. The countermeasure will be described below.

  In the present embodiment, as shown in FIG. 14, an input area 52 is provided in the display image 51 displayed by the terminal device 10 based on the transmission information given from the server device 20 via the network 30. . And when the information input into the input area 52 needs the countermeasure against the leakage by an electromagnetic signal, the input area 52 is set as a modification target. When a plurality of input areas 52 are provided in the display image 51, only some of the input areas 52 may be targeted for modification or all of the input areas 52 may be targeted for modification.

  Also, in order to make the terminal device 10 recognize the input area 52 to be modified, predetermined identification information or command is given in the transmission information. That is, an instruction regarding whether or not the input area 52 is to be modified is given to the terminal device 10 from the server device 20 (more specifically, the modification processing unit 21b). For example, the instruction is performed by setting a plug-in related to modification processing in transmission information to be transmitted to the terminal device 10. Introduction of the program for modification processing into the terminal device 10 is performed using a technique such as Java (registered trademark), Flash, Ajax, Apollo, or Silverlight, for example.

  Operations of the terminal device 10 and the server device 20 of the information processing system 100 according to the present embodiment will be described with reference to the flowcharts of FIGS. 15 and 16. In the present embodiment, the display control unit 11a of the terminal device 10 and the modification processing unit 21b of the server device 20 perform the following processing in addition to the above-described processing described in the first embodiment.

  That is, as shown in FIG. 15, the display control unit 11 a inputs information such as characters to the input area 52 provided in the display image 51 displayed on the display unit 15 via the operation unit 16. If so, the input is accepted (step S31). The display image 51 is created based on transmission information given from the server device 20 via the network 30.

  Subsequently, the display control unit 11a determines whether or not the input area 52 where the input has been performed is a modification target (step S32). This determination is made based on the identification information given in the transmission information described above.

  As a result of the determination in step S32, if the input area 52 is to be modified, the display control unit 11a creates an image such as a character based on the input information, and places the image in the input area 52. Displayed (step S33). On the other hand, if the input area 52 is to be modified, the input information is transmitted to the server device 20 via the network 30 without displaying an image on the input area 52 based on the input information (step S34). ). At this time, the input information is transmitted to the server device 20 as, for example, a key code related to the input character or the like. The key code is information representing operation contents of a key or a mouse (not shown) included in the operation unit 16.

  The modification processing unit 21b of the server device 20 identifies an image element such as a character to be modified based on the input information transmitted from the terminal device 10 (step S41), and the modification processing described above is performed on the identified image element. (Step S42).

  Subsequently, the modification processing unit 21b transmits information about the modified image element (for example, bitmap data) as first modified information to the terminal device 10 via the network 30 (step S43).

  Subsequently, the display control unit 11 a of the terminal device 10 creates an image such as a character based on the first modified information given from the server device 20, and displays the image in the input area 52 in the display image 51. (Step S35).

  Next, referring to the flowchart of FIG. 16, a part or all of the image displayed in the input area 52 to be modified in the display image 51 is erased by the operation via the operation unit 16 of the terminal device 10. The processing when being performed will be described.

  As illustrated in FIG. 16, the display control unit 11 a of the terminal device 10 erases part or all of the image displayed in the input area 52 that is the modification target in the display image 51 via the operation unit 16. If an operation has been performed, the operation is accepted (step S51). As this operation, for example, an operation with respect to a backspace key or a delete key of a keyboard can be cited. Another example is an operation in which a part or all of the image displayed in the input area 52 is selected and an instruction to delete the selected part is given.

  Subsequently, the display control unit 11 a notifies the server device 20 of the erasure instruction via the network 30 without updating (deleting processing) the display contents of the input area 52 based on the received erasure instruction. At this time, the server device 20 may be provided with information related to key operations related to the operation content of the operation unit 16.

  Subsequently, the modification processing unit 21b of the server device 20 creates information on the modified image to be displayed in the input area 52 after reflecting the erasure instruction in response to the notification of the erasure instruction from the terminal device 10. (Step S61). In this process, for example, after deleting the portion that is the target of the erasure instruction in the image displayed in the input area 52, the modified image of the image element such as a character to be displayed in the input area 52 Information about the element is created. Then, the modification processing unit 21b transmits the created information as second modified information to the terminal device 10 through the network 30 (step S62).

  Subsequently, the display control unit 11a of the terminal device 10 updates the display content of the input area 52 based on the second modified information given from the server device 20 (step S51). At this time, the portion of the image displayed in the input area 52 that is the target of the erasure instruction is erased.

  When a cursor image is displayed in the input area 52 to be modified, the following configuration can be adopted. For example, the modification processing unit 21b of the server device 20 may be configured to create image forming information (for example, bitmap data) that is a basis for the terminal device 10 to create a cursor image. In this case, the display control unit 11a of the terminal device 10 creates a cursor image based on the image forming information given from the server device 20, and displays the cursor image in the input area 52 that is a modification target. The cursor image is moved in the input area 52 based on an operation or the like via the operation unit 16 of the terminal device 10.

  For example, when movement of the cursor image is instructed via the cursor key or the mouse of the operation unit 16, a key code corresponding to the operation is given to the server device 20 via the network 30 by the display control unit 11 a of the terminal device 10. It is done. In response to this, the modification processing unit 21b of the server device 20 forms an image for displaying in the input area 52 a cursor image that has been moved to a new display position based on the given instruction (for example, key code). Business information is created and given to the terminal device 10 via the network 30. Then, the display control unit 11a of the terminal device 10 creates a cursor image whose display position has been moved based on the image formation information, and displays the cursor image in the input area 52 that is the modification target.

  At this time, the server device 20 may perform the above-described modification processing on the cursor image so that image forming information corresponding to the cursor image that has been modified is given to the terminal device 10.

  Next, in the information processing system 100 according to the present embodiment, when character conversion is instructed via the operation unit 16 of the terminal device 10 for the characters temporarily displayed in the input area 52 that is the modification target. The operation will be described.

  Here, “temporary display” refers to a display state in which character conversion is possible before an input character is confirmed. Here, in the state where the pre-conversion character is displayed in the provisional display state in the input area 52 to be modified, the pre-conversion character is not included in the operation unit 16 of the terminal device 10 with respect to the pre-conversion character. The operation when the conversion key is operated will be described. Note that the characters and the like displayed in the input area 52 to be modified are all displayed with the modification processing described above. For this reason, the pre-conversion characters that are temporarily displayed in the input area 52 to be modified are also displayed in a state where the modification processing has been performed.

  “Character conversion” refers to a process of converting a character input via the operation unit 16 into another character. The process of converting to Romaji or full-width Romaji. The “character conversion” may include a process of converting a character input via the operation unit 16 into another character registered in association with the character. For example, the character string “information processing system” and the character “ji” are registered in association with each other, and the character “ji” is input via the operation unit 16 to be converted. May be displayed in the input area 52 of the display unit 15.

  When the display control unit 11a of the terminal device 10 receives a conversion instruction for instructing character conversion for the pre-conversion character displayed in the input area 52 to be modified via the operation unit 16, the display control unit 11a transmits the conversion instruction to the network. The server apparatus 20 is notified via 30.

  The modification processing unit 21b of the server device 20 performs character conversion on the pre-conversion character in response to a conversion instruction notified from the terminal device 10. Then, the modification processing unit 21b performs the modification process on the conversion candidate character obtained by the character conversion, and uses the information obtained by the modification process as the third modified information via the network 30. To give.

  The display control unit 11a of the terminal device 10 corresponds to the conversion candidate character obtained by the character conversion on the character before conversion based on the third modified information given from the server device 20 in response to the notification about the conversion instruction. A candidate image to be created is created, and the candidate image is displayed on the display unit.

  When a selection instruction for selecting a candidate image corresponding to any conversion candidate character is input via the operation unit 16 of the terminal device 10, the display control unit 11 a transmits the selection instruction to the server via the network 30. The device 20 is notified. The modification processing unit 21b of the server apparatus 20 obtains the modification process by performing the modification process on the conversion candidate character designated by the selection instruction in response to the selection instruction notified from the terminal apparatus 10. The information is provided to the terminal device 10 through the network 30 as modified information. The display control unit 11a of the terminal device 10 creates a modified character image corresponding to the conversion candidate character selected based on the modified information and displays the modified character image in the input area 52 that is the modification target of the display unit 15. . This completes (confirms) the character conversion for the pre-conversion characters temporarily displayed in the input area 52 to be modified.

  Here, the notification of the conversion instruction performed by the display control unit 11 a of the terminal device 10, the creation of the conversion candidate character image, and the like are provided from the control unit 21 of the server device 10 via the network 30. It is executed by the program.

  Next, a specific example of character conversion will be described with reference to FIGS. Here, a case will be described in which a name is input to the input area 52 to be modified provided in the display image 51 of the terminal device 10. More specifically, as shown in FIG. 18, the keys are operated in the order of “W, A, T, A, N, A, B, E” by inputting Roman characters via the operation unit 16 of the terminal device 10. The case will be described.

  When the keys are operated in the order of “W, A, T, A, N, A, B, E”, “Watanabe” is temporarily displayed in the input area 52 in hiragana. This “Watanabe” is displayed in a modified state. In this state, when a conversion instruction regarding character conversion is input via the operation unit 16 of the terminal device 10, the conversion instruction is given from the terminal device 10 to the server device 20. The server device 20 performs character conversion on the “Watanabe” and performs a modification process on the conversion candidate character obtained by the character conversion. Then, the image forming information related to the conversion candidate characters after the modification processing is given from the server device 20 to the terminal device 10, and as shown in FIG. 17, a plurality of conversion candidate characters created based on the image forming information are created. The candidate image 53 is displayed in the display image 51 of the display unit 15 in a modified state.

  In the example shown in FIG. 17, a plurality of candidate images 53 are listed and displayed in the window area 54. And it inputs from the operation part 16 of the identification number provided to each candidate image 53 displayed in the window area | region 54. FIG. Alternatively, the selection bar 55 is moved to the position of the desired candidate image 53 via the operation unit 16. Thereby, a desired candidate image 53 can be selected from a plurality of candidate images 53 (conversion candidate characters).

  As described above, according to the present embodiment, when countermeasures against leakage are required for the input area 52 in the display image 51 such as the web screen displayed on the terminal device 10, the input is performed in the input area 52. Information can be prevented from being leaked by electromagnetic signals. For example, when a service related to web banking provided by the server device 20 is used by the terminal device 10, the terminal device 10 inputs important information regarding the amount of money, a transfer destination, and the like. According to the present embodiment, such leakage of important information can be reliably prevented.

  Further, an input area 52 to be modified in the display image 51 displayed on the terminal device 10 is designated on the server device 20 side. For this reason, the input area 52 in which information that requires countermeasures against information leakage may be input can be surely changed by an instruction from the server device 20, and thus input on the terminal device 10 side. It is possible to reliably prevent leakage of important information.

  In addition, when an instruction to delete part or all of the image displayed in the input area 52 to be modified is issued via the operation unit 16 of the terminal device 10, the deletion instruction is given to the server device 20. . At this time, the display content of the input area 52 is not updated by the terminal device 10 based on the deletion instruction. Then, the display content of the input area 52 is updated by the terminal device 10 based on the second modified information given from the server device 20 to the terminal device 10 in response thereto. Therefore, the display content displayed in the input area 52 to be modified can be reliably managed on the server device 20 side.

  Further, the terminal device 10 is convenient because it can cope with correction or deletion of information input to the input area 52 to be modified.

  In addition, when the character conversion for the character input to the input area 52 to be modified provided in the display image 51 of the terminal device 10 is instructed, the server device 20 converts the conversion candidate character to be a conversion candidate. Modification processing is performed. Then, the candidate image 53 obtained by the modification process is displayed on the display unit 15 by the terminal device 10. Therefore, even when the conversion candidate character at the time of character conversion is displayed on the display unit 15, the conversion candidate character can be subjected to modification processing, and more complete protection against information leakage due to electromagnetic signals can be performed. Can be expected.

[Third Embodiment]
19 and 20 are block diagrams of a terminal device and a server device provided in the information processing system according to the third embodiment of the present invention, and FIG. 21 is a flowchart showing operations of the terminal device and the server device. The information processing system 100 according to the present embodiment is substantially different from the information processing system 100 according to the first embodiment and the second embodiment described above in that it functions in the control units 11 and 21 of the terminal device 10 and the server device 20. Only the point where the element was added and its associated part. For this reason, the description regarding the part which the information processing system 100 which concerns on this embodiment and the information processing system 100 which concerns on the above-mentioned 1st Embodiment and 2nd Embodiment is common is abbreviate | omitted.

  In the present embodiment, as illustrated in FIG. 19, a modification control unit 11 b is provided as an additional functional element in the control unit 11 of the terminal device 10. The modification control unit 11b is a functional element that is generated only while the modification processing program given via the network 30 is being read by the control unit 11. Disappears upon termination.

  The modification control unit 11 b replaces the server device 20 with at least a part of the modification processing for the modification target image element included in the display image displayed on the display unit 15 based on the modification processing program given from the server device 20. Do it. The display control unit 11a causes the display unit 15 to display a display image after the modification process is performed on the image element to be modified by the modification control unit 11b.

  In the present embodiment, as shown in FIG. 20, a program supply unit 21 c is provided as an additional functional element in the control unit 21 of the server device 20. The program supply unit 21 c reads the modification processing program from the storage unit 24 and the like, and transmits the modification processing program to the terminal device 10 via the network 30.

  Here, the server apparatus 20 instructs the server apparatus 20 and the terminal apparatus 10 to share the modification process for the image element to be modified in any proportion or combination. For example, all the modification processes may be performed by the terminal device 10 or only a part of the modification processes may be performed by the terminal device 10.

  Next, operations of the terminal device 10 and the server device 20 will be described with reference to the flowchart of FIG. In the flowchart of FIG. 21, the same reference numerals are assigned to the steps corresponding to the flowchart of FIG. In addition, among the processes in each step in FIG. 21, processes other than steps S13a and S23a are substantially the same as the processes in FIG.

  In step S22 of FIG. 21, only the modification process assigned to the server device 20 is performed among the modification processes performed on the transmission information prepared by the information preparation unit 21a. When all the modification processes are performed by the terminal device 10, the modification process in step S22 is not performed.

  In step S23a, the program supply unit 21c transmits a program for modification processing in synchronization with the transmission information transmission processing by the information preparation unit 21a of the server device 20 or independently of the transmission information transmission processing. .

  Subsequently, in step S <b> 13 a, a display image based on transmission information given from the server device 20 is created by the display control unit 11 a of the terminal device 10, and the display image is displayed on the display unit 15. Also, in conjunction with (or independently of) this processing, the modification control unit 11b is based on the modification processing program given from the server device 20, and the modification target included in the display image displayed on the display unit 15 is displayed. Perform modification processing on image elements. The modified image element obtained by the modification process is displayed on the display unit 15 by the display control unit 11a.

In step S13a, the following processing described in the second embodiment may be performed. That is,
(a) accepting input of information via the operation unit 16 to the input area 52 to be modified in the display image 51 shown in FIG.
(b) modification processing for the image element identified based on the input information, and
(c) The modified image element obtained thereby may be displayed in the input area 52.

  In this case, since the modification process for the input information to the input area 52 is performed on the terminal device 10 side, the input information is not transmitted to the server device 20. In addition, processing necessary for updating the display content described above when a deletion instruction for an image displayed in the input area 52 is input via the operation unit 16 is also performed in the terminal device 10.

  As described above, according to the present embodiment, at least a part of the modification process can be performed by the terminal device 10 instead of the server device 20, thereby reducing the load on the server device 20.

  In addition, since the modification processing program used for the terminal device 10 to execute the modification processing is automatically supplied from the server device 20, it is not necessary to prepare in advance on the terminal device 10 side. Therefore, the information processing system 100 according to the present embodiment can be easily configured using the terminal device 10 that is generally used.

[Fourth Embodiment]
FIG. 22 is a diagram schematically showing a configuration of an information processing system according to the fourth embodiment of the present invention. The information processing system 100 according to the present embodiment is substantially different from the information processing system 100 according to the first to third embodiments described above in that the server device 20 in each of the above embodiments is replaced with a plurality of server devices (information processing (Apparatus) 61 to 63 only. For this reason, the description regarding the part which the information processing system 100 which concerns on this embodiment and the information processing system 100 which concerns on the above-mentioned 1st to 3rd embodiment is common is abbreviate | omitted.

  In the present embodiment, as shown in FIG. 22, a plurality of server devices 61 to 63 connected by a network 30 or another network 31 constitute a server device 20 corresponding to each of the above-described embodiments. Thereby, the functions of the server device 20 in each of the above-described embodiments are shared by the plurality of server devices 20.

  For example, any one of the plurality of server devices 61 to 63 (for example, the server device 61) is a main server device, and the other devices (for example, the server devices 62 and 63) are sub server devices. The main server device 61 is given a role as a window for the terminal device 10 and functions related to the above-described modification processing unit 21b and program supply unit 21c. The function regarding the above-mentioned information preparation part 21a is provided in all the server apparatuses 61-63, for example. And the modification process part 21b provided in the main server apparatus 61 performs the modification process with respect to the image element of the modification object contained in the transmission information prepared by the information preparation part 21a of each server apparatus 61-63. The transmission information prepared by the information preparation unit 21 a of each server device 61 to 63 is transmitted to the terminal device 10 by the information preparation unit 21 a provided in the main server device 61.

  With such a configuration, there is an advantage that a program or the like necessary for the modification process may be installed in the main server device 61.

  A specific example of the configuration shown in FIG. 22 is the configuration shown in FIG. In the example shown in FIG. 23, an ATM (hereinafter referred to as “convenience store ATM”) installed in a convenience store is applied as the terminal device 10, an ABC bank server device is applied as the server device 61, and XYZ is used as the server device 63. A server device of Shinkin Bank is applied. The server device 61 of ABC Bank is given functions related to the information preparation unit 21a, the modification processing unit 21b, and the program supply unit 21c. The server device 63 of XYZ Shinkin Bank is related to the information preparation unit 21a. Only the function is provided, and the functions relating to the modification processing unit 21b and the program supply unit 21c are not provided. For this reason, modification processing for transmission information given from the server device 63 of the XYZ Shinkin Bank to the convenience store ATM 10 via the network 30 is performed by the server device 61 of ABC Bank.

  In the configuration shown in FIG. 22 and FIG. 23, a dedicated appliance may perform processing related to the modification processing of the server device 61.

[Modification]
In the modification process performed in each of the above-described embodiments, bitmap data representing a modified image element that is an output of the modification process is output. As a modified example regarding this point, the following configuration can be given. Here, a case will be described in which the image element to be modified is defined by information relating to a character code and a font (for example, information specifying a font type).

  That is, information regarding at least one type of modified font corresponding to the modified image element is registered in advance in the modification processing unit 21b of the server device 20. Then, the modification processing unit 21b replaces information regarding the font of the image element to be modified with information regarding the modified font during the modification process. Information on the replaced modified font is transmitted to the terminal device 10 via the network 30 by the information preparation unit 21a together with the character code. The display control unit 11a of the terminal device 10 generates an image element based on the information regarding the character code and the modified font, and causes the display unit 15 to display the image element.

  Information (drawing information) necessary for drawing a character image corresponding to the modified font corresponding to the character code is, for example, the terminal device 10 via the network 30 when the modification processing unit 21b performs the modification processing. You may make it transmit to. Alternatively, the drawing information may be installed in the terminal device 10 in advance.

  Further, when a program for modification processing is given to the terminal device 10 to cause the terminal device 10 to perform modification processing, information regarding the font is replaced by the modification control unit 11b of the terminal device 10. Also in this case, the drawing information related to the modified font may be provided to the terminal device 10 together with the modification processing program, or may be installed in the terminal device 10 in advance.

  When such a configuration is adopted, the modification process is completed simply by replacing the font, so that the load on the server device 20 and the like due to the modification process can be reduced and the modification process can be speeded up.

  The following structure is mentioned as a further modification. That is, information related to a plurality of types of modified fonts corresponding to the modified image element is registered in advance in the modification processing unit 21b of the server device 20 in association with the font type of the image element to be modified. As the types of modified fonts to be registered, for example, Mincho, Kaku Gothic, and Round Gothic are prepared. Then, the modification processing unit 21b selects a modified font associated with the font type of the image element to be modified from among a plurality of types of modified fonts during the modification process, and relates to the font of the image element to be modified. Replace the information with information about the selected modified font.

  As a result, the font used for the modified image element can be the same or similar to the font type of the image element before the modification, and the modification process changes the font of the image element to a completely different font. It is possible to avoid inconveniences such as

  Further, as a modification of the configuration according to each of the above-described embodiments, a part or all of the information transmitted via the network 30 between the terminal device 10 and the server device 20 is transmitted in an encrypted state. May be. This encryption can be performed by using an encryption function such as SSL (Secure Socket Layer). Thus, by encrypting information transmitted between the terminal device 10 and the server device 20, it is possible to prevent important information such as confidential information from being acquired and leaked by an unauthorized third party.

It is a figure which shows typically the structure of the information processing system which concerns on 1st Embodiment of this invention. It is a block diagram of the terminal device with which the information processing system of FIG. 1 is equipped. It is a block diagram of the server apparatus with which the information processing system of FIG. 1 is equipped. It is a figure which shows an example of the display image displayed on the display part of the terminal device of FIG. (A) is a figure which shows an example of the image element used as the object of a modification process, (b) is a figure which shows the state after the modification process of the image element. It is a figure which expands and shows the lower part of FIG.5 (b). (A) is a figure which shows the RGB signal for 1 line along the horizontal line 8 of Fig.5 (a), (b) is the RGB signal for 1 line along the horizontal line 9 of FIG.5 (b). FIG. (A) is a figure which shows the measurement result of the electromagnetic signal discharge | released by the RGB signal of Fig.7 (a), (b) shows the measurement result of the electromagnetic signal discharge | released by the RGB signal of FIG.7 (b). FIG. It is a schematic diagram which shows the case where the horizontal width | variety of the area | region where a gradation is given is changed, (a) shows the case where the said width is narrow, (b) shows the case where the said width is wide. (A) is a figure which shows the image of the line segment before modification, (b) is a figure which shows the image of the line segment after modification. It is a schematic diagram for demonstrating how to attach the modification part using vector information. It is a flowchart which shows operation | movement of the terminal device with which the information processing system of FIG. 1 is equipped, and a server apparatus. It is a flowchart which shows the operation | movement regarding the modification process by a server apparatus in detail. It is a figure which shows the example of the display image with an input area displayed by a terminal device. It is a flowchart which shows operation | movement of the terminal device with which the information processing system which concerns on 2nd Embodiment of this invention is equipped, and a server apparatus. It is a flowchart which shows operation | movement of the terminal device with which the information processing system which concerns on 2nd Embodiment of this invention is equipped, and a server apparatus. It is explanatory drawing for demonstrating operation | movement when the character conversion is instruct | indicated in the terminal device side in the information processing system which concerns on 2nd Embodiment of this invention. It is a figure which shows the information of the key operated in the operation part of the terminal device in the example shown in FIG. It is a block diagram of the terminal device with which the information processing system concerning a 3rd embodiment of the present invention is equipped. It is a block diagram of the server apparatus with which the information processing system which concerns on 3rd Embodiment of this invention is equipped. It is a flowchart which shows operation | movement of the terminal device of FIG.19 and FIG.20, and a server apparatus. It is a figure which shows typically the structure of the information processing system which concerns on 4th Embodiment of this invention. It is a figure which shows the specific example of a structure shown in FIG.

Explanation of symbols

  3 modification unit, 10 terminal device, 11 control unit, 11a display control unit, 11b modification control unit, 12 ROM, 13 RAM, 14 storage unit, 15 display unit, 16 operation unit, 17 communication unit, 20 server device, 21 control Unit, 21a information preparation unit, 21b modification processing unit, 21c program supply unit, 22 ROM, 23 RAM, 24 storage unit, 25 communication unit, 30, 31 network, 61-63 server device, 100 information processing system.

Claims (23)

A terminal device, and a server device connected to the terminal device via a network,
The terminal device
A display unit;
A display control unit that forms a display image based on transmission information given from the server device via the network, and displays the display image on the display unit;
With
The server device
An information preparation unit that prepares the transmission information and provides the transmission information to the terminal device via the network;
A modification processing unit that performs a modification process on a modification target image element defined by a character code or vector information included in the transmission information prepared by the information preparation unit;
With
The modification process is a process of modifying the contour part of the image element to be modified, or a process of replacing the image element to be modified with a previously prepared modified image element having a modified contour part. And
The information preparation system provides the transmission information to the terminal device via the network after the modification processing on the modification-target image element included in the transmission information is performed. . The information processing system according to claim 1,
The information preparation unit of the server device prepares web information related to a web page as the transmission information, and the web information is transmitted via the network using a communication protocol used for information communication between a web server and a web client. To the terminal device,
The display control unit of the terminal device forms an image of a web page as the display image based on the web information given through the network, and displays the image on the display unit. Information processing system. In the information processing system according to claim 1 or 2,
The terminal device further includes an operation unit that receives an operation,
The display control unit of the terminal device gives the input information received via the operation unit to the server device via the network,
The information preparation system of the server device prepares the transmission information based on the input information given from the terminal device and provides the transmission information to the terminal device via the network. In the information processing system according to claim 1 or 2,
The terminal device
It further includes an operation unit for receiving an operation,
The display control unit
The input based on the input information input via the operation unit when the input to the input area provided in the display image displayed on the display unit and to be modified is received via the operation unit Without displaying the image in the area, the input information is given to the server device via the network, and an image is created based on the first modified information given from the server device in response to the input information. , Display the image in the input area,
The modification processing unit of the server device includes:
The modification process is performed on the image element specified by the input information provided from the terminal device, and the information obtained by the modification process is provided to the terminal device as the first modified information via the network. An information processing system characterized by this. The information processing system according to claim 4,
The modification processing unit of the server device notifies the terminal device of the input region to be modified in the display image displayed on the terminal device via the information preparation unit. Information processing system. In the information processing system according to claim 4 or 5,
The modification control unit of the terminal device is
When an instruction to delete part or all of the image displayed in the input area that is the target of modification is received, the deletion instruction is not updated without updating the display content of the input area based on the deletion instruction. Notifying the server device via the network, in response to updating the display content of the input area based on second modified information given from the server device,
The modification processing unit of the server device includes:
In response to the notification of the erasure instruction from the terminal device, information on a modified image to be displayed in the input area after reflecting the erasure instruction is created, and the information is used as the second modified information. As an information processing system that is provided to the terminal device via the network. The information processing system according to any one of claims 4 to 6,
The display control unit
When a conversion instruction for instructing character conversion for a pre-conversion character that is the image displayed in the input area to be modified is received via the operation unit, the conversion instruction is transmitted to the server via the network. Informing the device, creating a candidate image corresponding to the conversion candidate character based on the third modified information given from the server device in response thereto, displaying the candidate image on the display unit,
The modification processing unit of the server device includes:
In response to notification of the conversion instruction from the terminal device, character conversion is performed on the pre-conversion character, the modification process is performed on the conversion candidate character obtained by the character conversion, and the modification process is performed. Information is provided to the terminal device via the network as the third modified information. The information processing system according to any one of claims 1 to 7,
In the modification process performed by the modification processing unit of the server device, a process of assigning at least one modification unit to a contour part of the image element to be modified, or a display image of the image element to be modified A process of replacing the image element with the modified image prepared in advance, in which at least one modifying part is added to the contour part of the contour part, is performed,
The attribute value of at least one of the three attribute values including the hue, brightness, and saturation of the modification unit is determined from the attribute value corresponding to the image element to which the modification unit is assigned. An information processing system characterized by being gradually changed to a corresponding attribute value of an image. The information processing system according to claim 8,
The information processing system, wherein the modification unit gradually changes at least one of the three attribute values in a horizontal direction that is a main scanning direction of the display unit. The information processing system according to claim 9,
The information processing system according to claim 1, wherein the modification unit is provided in a plurality of locations of a contour portion of the image element to be modified, and has a substantially linear form extending along the horizontal direction of the display unit. The information processing system according to any one of claims 1 to 7,
The image element to be modified includes a line segment extending in a horizontal direction that is a main scanning direction of the display unit,
In the modification process performed by the modification processing unit of the server device, the line segment is provided with at least one modification unit extending in the horizontal direction, or the line segment is previously provided with the at least one modification unit. The process of replacing with the prepared modified line segment is performed,
In the portion provided with the modification part of the line segment, at least one attribute value of three attribute values including the hue, brightness, and saturation of the line segment is determined by the modification part of the line segment. An information processing system characterized by being gradually changed from a corresponding attribute value of a portion not provided to a corresponding attribute value of a background image of the line segment. The information processing system according to any one of claims 1 to 11,
The modification processing unit of the server device creates bitmap data corresponding to the image element to be modified after the modification process, and replaces original information regarding the image element to be modified with the bitmap data. A featured information processing system. The information processing system according to any one of claims 1 to 11,
The image element to be modified is defined by information on a character code and a font,
In the modification processing unit of the server device, information on at least one type of modified font corresponding to the modified image element is registered in advance,
The information processing system, wherein the modification processing unit replaces information on the font of the image element to be modified with information on the modified font. The electronic device according to claim 13,
In the modification processing unit, information on a plurality of types of modified fonts corresponding to the modified image element is registered in advance in association with the font type of the image element to be modified,
The modification processing unit selects a modified font associated with the font type of the image element to be modified from the plurality of types of modified fonts, and data regarding the font of the image element to be modified, An information processing system, wherein data relating to the selected modified font is replaced. In the information processing system according to claim 1 or 2,
The terminal device
An operation unit for receiving an operation;
Based on the program for modification processing given from the server device via the network, at least a part of the modification processing for the modification-target image element included in the display image displayed on the display unit is the server device. A modification control unit that performs on behalf of
Further comprising
The display control unit of the terminal device causes the display unit to display the display image after the modification process is performed on the modification-target image element by the modification control unit,
The server device
An information processing system, further comprising: a program supply unit that supplies the modification processing program to the terminal device via the network. The information processing system according to any one of claims 1 to 15,
An information processing system, wherein the server device is constituted by a single information processing device. The information processing system according to any one of claims 1 to 15,
The information processing system, wherein the server device includes a plurality of information processing devices. A terminal device, and a server device connected to the terminal device via a network,
The terminal device
A display unit;
A display control unit that forms a display image based on transmission information given from the server device via the network, and displays the display image on the display unit;
Based on a program for modification processing given from the server device via the network, a modification control unit that performs modification processing on a modification target image element defined by a character code or vector information included in the display image;
With
The server device
An information preparation unit that prepares the transmission information and provides the transmission information to the terminal device via the network;
A program supply unit for supplying the modification processing program to the terminal device via the network;
With
The display control unit of the terminal device causes the display unit to display the display image after the modification process is performed on the modification-target image element by the modification control unit,
The modification process is a process of modifying the contour part of the image element to be modified, or a process of replacing the image element to be modified with a previously prepared modified image element having a modified contour part. An information processing system characterized by An information processing method using a terminal device and a server device connected to the terminal device via a network,
Preparing transmission information for causing the terminal device to form a display image by the server device;
Performing modification processing on the image element to be modified defined by the character code or vector information included in the prepared transmission information by the server device;
Providing the transmission information to the terminal device via the network after the modification processing is performed on the modification-target image element included in the transmission information by the server device;
Forming the display image on the basis of the transmission information given from the server device by the terminal device, and displaying the display image on a display unit;
With
The modification process is a process of modifying the contour part of the image element to be modified, or a process of replacing the image element to be modified with a previously prepared modified image element having a modified contour part. The information processing method characterized by being. An information processing method using a terminal device and a server device connected to the terminal device via a network,
Providing the terminal device with transmission information and a modification processing program for causing the terminal device to form a display image by the server device via the network;
The terminal device forms the display image based on the transmission information given from the server device, and the character code included in the display image based on the modification processing program given from the server device. Or performing a modification process on the modification target image element defined by the vector information;
Displaying the display image after the modification process is performed on the image element to be modified by the terminal device on a display unit;
With
The modification process is a process of modifying the contour part of the image element to be modified, or a process of replacing the image element to be modified with a previously prepared modified image element having a modified contour part. The information processing method characterized by being. A server device connected to a terminal device via a network,
Preparing transmission information for causing the terminal device to form a display image, and providing the transmission information to the terminal device via the network;
A modification processing unit that performs a modification process on a modification target image element defined by a character code or vector information included in the transmission information prepared by the information preparation unit;
With
The modification process is a process of modifying the contour part of the image element to be modified, or a process of replacing the image element to be modified with a previously prepared modified image element in which the contour part is modified And
The server device, wherein the information preparation unit provides the transmission information after the modification processing on the modification-target image element included in the transmission information to the terminal device via the network. A program read by a computer connected to a terminal device via a network,
The program is stored in the computer.
A procedure for preparing transmission information for forming a display image on the terminal device;
A procedure for performing a modification process on an image element to be modified defined by a character code or vector information included in the prepared transmission information;
A procedure for providing the transmission information to the terminal device via the network after the modification processing is performed on the modification-target image element included in the transmission information;
And execute
The modification process is a process of modifying the contour part of the image element to be modified, or a process of replacing the image element to be modified with a previously prepared modified image element having a modified contour part. A program characterized by being. A program read by a computer constituting the server device according to claim 20,
The program causes the computer to execute processing performed by the modification processing unit.

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