JP5980771B2 - Image processing system and log recording method - Google Patents

Description

  The present invention relates to an image processing system and a log recording method, and more specifically, an image that can easily increase the number of external storage media when necessary while limiting the number of external storage media capable of storing logs. The present invention relates to a processing system and a log recording method.

  Conventionally, when an image forming apparatus such as a copying machine has some trouble, the internal information (log) and image data of the image forming apparatus are taken out into a portable external memory to analyze the cause of the trouble. There is a case.

  The extracted internal information includes confidential information of the user, or the image data itself is confidential information. Further, the external memory is portable and can be easily attached and detached by any number of unspecified people. Therefore, when extracting internal information and image data from the image forming apparatus, it is necessary to consider security in terms of security.

  Therefore, for example, in Japanese Patent Application Laid-Open No. 2011-104796 (Patent Document 1), a storage unit configured by a non-volatile memory, an external I / F configured to be detachable from an external storage medium, and internal information of the device are described. It is determined whether the recorded log and image data are stored in the storage unit or the external storage medium. When the log and image data are stored in the storage unit, the log and image data are not encrypted, and the external storage medium An image forming apparatus including a control unit that encrypts the log and the image data in the case of storing the log and image data is disclosed. Further, the control means determines whether to store the log and image data in which the internal information of the apparatus is stored in a storage unit constituted by a nonvolatile memory or an external storage medium removable from the external I / F, There is disclosed a log recording method including a step of encrypting the log and image data when storing in the storage unit, and encrypting the log and image data when storing in the external storage medium. This makes it possible to ensure security in terms of security when taking out internal information and image data from the apparatus main body.

JP 2011-104796 A

  However, in the technique described in Patent Document 1, information encrypted with a password stored by a user or a service person is decrypted. Therefore, there is a problem that it is necessary to pay careful attention to password management. Further, since the encrypted log can be freely copied to an external storage medium, there is a problem that the encrypted log and customer information may inadvertently flow out to the outside.

  In particular, the log and image data described above often include personal information such as the fax number and mail address of the user or customer who uses the image forming apparatus. If it is illegally decrypted by this, it becomes a big problem in terms of security.

  As another technique, there is a method in which an image forming apparatus stores a log only in a specific external storage medium using individual information (solid information) added to the external storage medium. In this method, only the specific external storage medium can store the log of the image forming apparatus. Therefore, although it is preferable for security, individual information of the specific external storage medium is registered in the image forming apparatus in advance. It is necessary to keep. Therefore, for example, when a service person or the like loses a specific external storage medium, there is a problem that the specific external storage medium cannot be easily increased.

  Accordingly, the present invention has been made to solve the above-described problem, and can easily increase the number of external storage media when necessary while limiting the number of external storage media capable of storing logs. An object is to provide a possible image processing system and a log recording method.

  In order to solve the above-described problems and achieve the object, an image processing system according to the present invention is an image processing system having a terminal device and an image processing device to which an external storage medium can be attached, and has the following configuration. adopt.

  That is, according to the present invention, when the external storage medium is mounted, the terminal device stores a file including individual information registered in the external storage medium in the external storage medium, and includes the individual information. When the file creation means for creating the table and the external storage medium storing the encrypted log are attached, it is determined that the individual information of the external storage medium matches the individual information of the table. Decoding means for decoding the converted log, and when the image processing apparatus is loaded with an external storage medium storing the file, the individual information of the external storage medium matches the individual information of the file An individual information determination unit that determines whether or not to perform the processing, and if the individual information of the external storage medium matches the individual information of the file as a result of the determination, the log of the image processing apparatus Encrypting, characterized in that it comprises an encryption means for storing the encrypted logs to an external storage medium.

  The image processing apparatus further includes expiration date determination means for determining whether the current date and time is within the expiration date of the file when an external storage medium storing the file is loaded, The file creation means determines a predetermined expiration date, creates a file in which the expiration date is associated with the individual information, stores the file in the external storage medium, and the encryption means As a result, when the current date and time is within the expiration date of the file, the log of the image processing apparatus is encrypted, and the encrypted log is stored in the external storage medium.

  The present invention can be provided as a log storage method for an image processing system having a terminal device to which an external storage medium can be attached and an image processing apparatus.

  That is, according to the present invention, when the external storage medium is attached to the terminal device, a file including individual information registered in advance in the external storage medium is stored in the external storage medium, and the table including the individual information is stored. And a step of determining whether or not the individual information of the external storage medium matches the individual information of the file when the external storage medium storing the file is attached to the image processing apparatus. If the individual information of the external storage medium matches the individual information of the file as a result of the determination, the log of the image processing apparatus is encrypted and the encrypted log is stored in the external storage medium And when the external storage medium storing the encrypted log is attached to the terminal device, the individual information of the external storage medium matches the individual information of the table After having determined that that, characterized in that it comprises the step of decrypting the encrypted log. Even with such a configuration, the same effects as described above can be obtained.

  According to the image processing system and the log recording method of the present invention, it is possible to easily increase the number of external storage media when necessary while limiting the number of external storage media capable of storing logs.

1 is a schematic diagram of an image processing system according to an embodiment of the present invention. It is a conceptual diagram which shows the whole structure of the operation part which concerns on embodiment of this invention. It is a figure which shows the structure of the control system hardware of the image processing system which concerns on this invention. It is a functional block diagram of the image processing system of this invention. It is a flowchart for showing the execution procedure of this invention. It is a conceptual diagram which shows the exchange of data of the image processing system of this invention.

  In the following, an embodiment of an image processing system of the present invention will be described with reference to the accompanying drawings for understanding of the present invention. In addition, the following embodiment is an example which actualized this invention, Comprising: The thing of the character which limits the technical scope of this invention is not. Moreover, the alphabet S added before the number in a flowchart means a step.

<Image processing system>
Hereinafter, an image processing system including an image processing device and a terminal device will be described as an image processing system according to an embodiment of the present invention. FIG. 1 is a schematic diagram of an image processing system according to an embodiment of the present invention. However, details of each part not directly related to the present invention are omitted. Note that the image processing apparatus of the present invention corresponds to, for example, a multi-function peripheral having functions such as a copy, a scanner, and a printer, and functions as an image processing apparatus having a copy function, a scanner function, a printer function, and the like.

  Hereinafter, for example, the operation of the MFP 100 (Multi Function Peripheral) when the user uses the copy function will be briefly described.

  First, when the user uses the multifunction machine 100, a document is placed on the document table 101 provided on the upper surface of the casing, and an operation unit 102 (operation panel) provided in the vicinity of the document table 101 is provided. The input of the setting condition regarding the image processing is input from the operation screen of the operation unit 102. When the user presses a start key provided on the operation unit 102, the multi-function device 100 starts image processing (copy function, print processing).

  Next, in the image reading unit 103, the light emitted from the light source 104 is reflected by the document placed on the document table 101. The reflected light is guided to the image sensor 108 by the mirrors 105, 106, and 107. The guided light is photoelectrically converted by the image sensor 108, and image data corresponding to the original is generated.

  An image forming unit 109 forms a toner image based on the image data. The image forming unit 109 is provided with a photosensitive drum 110. The photosensitive drum 110 rotates in a predetermined direction at a constant speed, and around the charger drum, the exposure unit 112, the developing unit 113, the transfer unit 114, the cleaning unit 115, and the like in that order from the upstream side in the rotation direction. Is arranged.

  The charger 111 uniformly charges the surface of the photosensitive drum 110. The exposure unit 112 irradiates the charged surface of the photosensitive drum 110 with a laser based on the image data to form an electrostatic latent image. The developer 114 forms a toner image by attaching toner to the formed electrostatic latent image. The formed toner image is transferred to a recording medium (for example, paper, sheet) by the transfer device 114. The cleaning unit 115 removes excess toner left on the surface of the photosensitive drum 110. A series of these processes is executed by rotating the photosensitive drum 110.

  The sheets are conveyed from a plurality of paper feed cassettes 116 provided in the multi function peripheral 100. When the sheet is conveyed, the sheet is pulled out from any one of the sheet feeding cassettes 116 to the conveyance path by the pickup roller 117. Each sheet cassette 116 stores sheets of different paper types, and the sheets are fed based on setting conditions relating to image processing.

  The sheet pulled out to the conveyance path is fed between the photosensitive drum 110 and the transfer device 114 by the conveyance roller 118 and the registration roller 119. When the sheet is fed, the toner image is transferred to the sheet by the transfer unit 114 and conveyed to the fixing device 120.

  When the sheet on which the toner image is transferred passes between a heating roller and a pressure roller provided in the fixing device 120, heat and pressure are applied to the toner image, and the visible image is fixed on the sheet. The The amount of heat of the heating roller is optimally set according to the paper type, and the fixing is performed appropriately. The visible image is fixed on the sheet, and the image formation is completed. The sheet is discharged by a conveying roller 118 to a cylinder tray 122 provided in the cylinder of the casing unit via a sheet discharge port 121. The The sheets are stacked and stored on the in-body tray 122. Through the above procedure, the multi-function device 100 provides a copy function to the user.

  Here, for example, when the MFP 100 executes the copy function, the internal information is stored as a log in a predetermined internal storage medium. In this internal storage medium, a log of processing executed by the multifunction device 100 is accumulated.

  For example, a user such as a service person attaches an external storage medium 200 (for example, a USB memory) with the terminal device 300, registers the external storage medium 200, and attaches the external storage medium 200 to the multi function device 100. Thus, the log of the internal storage medium of the multifunction peripheral 100 is stored in the external storage medium 200. When the user re-attaches the external storage medium 200 to the terminal device 300, the log stored in the external storage medium 200 is stored in a predetermined storage medium of the terminal device 300, and log storage (migration) is performed. Is completed (details will be described later).

  FIG. 2 is a conceptual diagram showing the overall configuration of the operation unit according to the embodiment of the present invention. The user uses the operation unit 102 to input setting conditions for the image processing as described above, and to confirm the input setting conditions. When the setting conditions are input, a touch panel 201 (operation panel), a touch pen 202, and operation keys 203 provided in the operation unit 102 are used.

  The touch panel 201 has both a function for inputting setting conditions and a function for displaying the setting conditions. That is, by pressing a key in the screen displayed on the touch panel 201, a setting condition corresponding to the pressed key is input.

  A display unit (not shown) such as an LCD (Liquid Crystal Display) is provided on the back surface of the touch panel 201, and the display unit displays an operation screen such as the initial screen, for example. A touch pen 202 is provided in the vicinity of the touch panel 201. When the user touches the touch pen 201 with the tip of the touch pen 202, a sensor provided under the touch panel 201 detects the touch destination.

  Further, a predetermined number of operation keys 203 are provided in the vicinity of the touch panel 201, and for example, a ten key 204, a start key 205, a clear key 206, a stop key 207, a reset key 208, and a power key 209 are provided.

  Next, the configuration of the control hardware of the image processing system 1 will be described with reference to FIG. FIG. 3 is a diagram showing the configuration of the control system hardware of the image processing system according to the present invention. However, details of each part not directly related to the present invention are omitted.

  The control circuit of the multifunction peripheral 100 of the image processing system 1 corresponds to a CPU (Central Processing Unit) 301, a ROM (Read Only Memory) 302, a RAM (Random Access Memory) 303, an HDD (Hard Disk Drive) 304, and each drive unit. The driver 305, the operation unit 102, and the mounting port 306 of the external storage medium 200 are connected by an internal bus 307.

  For example, the CPU 301 uses the RAM 303 as a work area, executes a program stored in the ROM 302, the HDD 304, and the like, and based on the execution result, the driver 305, the operation unit 102, and the mounting port 306. 1 receives data, instructions, signals, commands, and the like from the external storage medium 200 attached to and controls the operation of each drive unit shown in FIG.

  In addition, the control circuit of the external storage medium 200 of the image processing system 1 connects the ROM 307, the RAM 308, and the mounting unit 309 via the internal bus 310, and stores the program and data of the terminal device 300 and the log of the multifunction device 100.

  In the control circuit of the terminal device 300 of the image processing system 1, the CPU 311, the ROM 312, the RAM 313, the HDD 314, and the mounting port 315 of the external storage medium 200 are connected by an internal bus 316. The function of each member is the same as described above.

  Also, each means (shown in FIG. 4) other than the drive unit described later is realized by the CPU 301 of the multifunction peripheral 100 and the CPU 311 of the terminal device 300 executing each program. The ROM 302, RAM 303, HDD 304 of the multi-function peripheral 100, ROM 307, RAM 308 of the external storage medium 200, ROM 312, RAM 313, HDD 314 of the terminal device 300 store programs and data for realizing each means described below.

<Embodiment of the present invention>
Next, the configuration and execution procedure according to the embodiment of the present invention will be described with reference to FIGS. 4 and 5. FIG. 4 is a functional block diagram of the image processing system of the present invention. FIG. 5 is a flowchart for showing the execution procedure of the present invention.

  First, when a user attaches a mounting portion 309 of a predetermined external storage medium 200 (USB memory) to a mounting port 315 of a terminal device 300 provided in a specific company such as a head office or a development company, the control of the terminal device 300 is performed. The means 401 detects the mounting of the external storage medium 200 (FIG. 5: S101) and notifies the file creation means 402 to that effect. Upon receipt of the notification, the file creation unit 402 acquires individual information (for example, “ABC”) registered in advance in the external storage medium 200 as shown in FIG. An expiration date that can be used by the storage medium 200 for storing the log is determined (FIG. 5: S103).

  Here, as the individual information of the external storage medium 200, for example, a serial number, a manufacturing number, an individual number, a manufacturer name, a model number, or the like that can uniquely identify the external storage medium 200 can be adopted. The expiration date is, for example, a predetermined period (for example, from the time when the external storage medium 200 is mounted (for example, 2013/11/06 9:00) or the time when a file described later is stored in the external storage medium 200) , “2 weeks”). The function of this expiration date will be described later.

  Then, the file creation unit 402 creates a file (“file A”) in which the individual information (“ABC”), the expiration date (“2 weeks”), and the public key (“public key A”) are associated with each other. The file (“file A”) is stored in the storage means 403 of the external storage medium 200 (FIG. 5: S104).

  Here, the public key may be a normal common key, but for example, even a key generated in advance in the terminal device 300 is generated by attaching the external storage medium 200 like a one-time password. A one-time key can be used. If it is a one-time key, security can be further enhanced.

  The file is not particularly limited as long as it is a file in which individual information, an expiration date, and a public key are associated with each other. Even a simple table is a file having a program corresponding to each means described later. It doesn't matter.

  When the file creation unit 402 stores the file (“file A”) in the storage unit 403 of the external storage medium 200, for example, a common key (“common key B”) common to the terminal device 300 and the multifunction peripheral 100 is used. If the file is encrypted and then stored in the storage unit 403 of the external storage medium 200, security can be further improved.

  When the file creation unit 402 completes creation and storage of the file, a table (“table C”) is created that associates the private key (“secret key A”) corresponding to the public key of the file with the individual information. Then, it is stored in a predetermined memory of the terminal device 300 (FIG. 5: S105).

  Here, the table is not particularly limited as long as it is a table in which individual information and a secret key are associated with each other, and may be a simple table or a table provided with a program corresponding to each means described later. Absent. If the public key is a normal common key, the secret key of the table may be a common key.

  As a result, a file (“file A”) including individual information that can uniquely identify the external storage medium 200 is stored in the external storage medium 200, and a table (“table C” including the individual information is stored in the terminal device 300. ”) Is stored, and the preparation for storing the log is limited to the external storage medium 200 is completed.

  Now, the user detaches the external storage medium 200 from the terminal device 300, carries the external storage medium 200, goes to the multifunction device 100, and attaches the external storage medium 200 to the attachment port 306 of the multifunction device 100. When the unit 309 is attached, the detection unit 404 of the multifunction peripheral 100 detects the attachment of the external storage medium 200 (FIG. 5: S106), and confirms that the external storage medium 200 storing the file is attached. After confirmation, the fact is notified to the individual information determination means 405. Upon receiving the notification, the individual information determination unit 405 confirms that the file is stored in the storage unit 403 of the external storage medium 200, and then acquires the individual information of the external storage medium 200 (FIG. 5: In step S107, it is determined whether the individual information of the external storage medium 200 matches the individual information of the file (“ABC”) (FIG. 5: S108).

  When the individual information determination unit 405 executes the determination, if the file is encrypted with the common key (“common key B”), it is also registered in advance in the multifunction device 100. After decryption using a common key, individual information (“ABC”) is acquired from the file, and the determination is executed.

  As a result of the determination, when the individual information of the external storage medium 200 matches the individual information (“ABC”) of the file (FIG. 5: S108 YES), the individual information determination unit 405 notifies the expiration date determination unit. 406 is notified. Upon receiving the notification, the expiration date determination unit 406 obtains the current date and time from a clock unit that passes through the current date and time (system time) provided in advance in the MFP 100, and the current date and time is the expiration date of the file. Is determined (FIG. 5: S109).

  Here, when the expiration date determination unit 406 determines whether or not the current date and time is within the expiration date of the file, for example, the current date and time is 2013/11/07 9:00, and the expiration date is However, if it is two weeks from 9:00 on 2013/11/06, it is determined whether or not the current date and time is included in the period of the expiration date.

  As a result of the determination, if the current date and time is within the expiration date of the file (FIG. 5: S109 YES), the expiration date determination means 406 notifies the encryption means 407 to that effect. Upon receiving the notification, the encryption unit 407 encrypts the log of the multifunction peripheral 100 with the public key of the file (“public key A”), and stores the encrypted log in the storage unit 403 of the external storage medium 200. (FIG. 5: S110).

  Here, the log includes, for example, processing progress information, failure information, internal information, defect information, customer information, facsimile number, e-mail address information, and the like of the multifunction peripheral 100.

  Accordingly, since the log is encrypted with the public key, for example, the user loses the external storage medium 200 having the encrypted log on the way to the terminal device 300, and the other user stores the external storage medium. Even if the medium 200 is obtained and the encrypted log is to be decrypted, it cannot be decrypted unless the terminal device 300 has the private key. Therefore, even if the user loses the external storage medium 200, security can be ensured.

  In addition, in order to determine whether or not to perform encryption and log storage based on the individual information, the encrypted log is limited to the external storage medium 200 in which the file is once created by the terminal device 300. It becomes possible to memorize. Therefore, for example, it is possible to effectively prevent another user from extracting only the file from the external storage medium 200 to another external storage medium and storing the log in the other external storage medium. It becomes possible. That is, it is possible to limit the number of external storage media 200 that can store logs.

  Now, the user detaches the external storage medium 200 from the multifunction peripheral 100, carries the external storage medium 200, goes to the terminal device 300 again, and enters the external storage medium 200 in the mounting port 315 of the terminal device 300. When the mounting unit 309 is mounted, the control unit 401 of the terminal device 300 detects the mounting of the external storage medium 200 (FIG. 5: S111), and the external storage medium 200 in which the encrypted log is stored. Is confirmed, and the decryption means 408 is notified of that fact. Upon receiving the notification, the decryption means 408 obtains the individual information (for example, “ABC”) of the external storage medium 200 (FIG. 5: S112), and the individual information of the external storage medium 200, as shown in FIG. It is determined whether (“ABC”) matches the individual information of the table (“Table C”) (FIG. 5: S113).

  As a result of the determination, when the individual information (“ABC”) of the external storage medium 200 matches the individual information of the table (“Table C”) (FIG. 5: S113 YES), the decryption unit 408 matches the information. The encrypted log is decrypted with the private key (“secret key A”) of the table (“table C”) having the individual information (“ABC”) (FIG. 5: S114).

  Here, since the encrypted log is not decrypted unless it is the same external storage medium 200 as the external storage medium 200 initially attached to the terminal device 300, the encrypted log is decrypted. This corresponds to managing the password on the terminal device 300 side, and security can be further enhanced.

  In addition, security can be further enhanced by using a public key and a secret key. For example, if the public key and the secret key are changed to a one-time key, only the external storage device 200 initially attached to the terminal device 300 can generate the public key and the secret key. I can do it.

  In addition, the above-described log encryption / decryption is not performed by the user storing a specific password, but the individual information stored in the external storage medium 200 is successfully used to achieve log encryption / decryption. Yes. This eliminates the need for the user to memorize and sufficiently manage the password, and reliably prevents the log from being leaked outside due to insufficient management of the password.

  Furthermore, in this system 1, since the file and the table are created using the individual information of the external storage medium 200 and the log is stored, even if the external storage medium 200 is lost, If a new external storage medium 200 is connected to the terminal device 300, a new file or table is created using the individual information of the new external storage medium 200, and the number of external storage media 200 for log storage is easily increased. It is possible to make it. This advantage is that, for example, if the log storage method permits log storage only in the external storage medium 200 registered in advance in both the multifunction peripheral 100 and the terminal device 300, the external storage medium 200 is lost. Therefore, it becomes necessary to re-register a new external storage medium 200 in the multi-function device 100 and the terminal device 300, and the disadvantage that it is very troublesome can be solved.

  In the present invention, the terminal device 300 basically creates a predetermined file on the terminal device 300 side using the individual information of the external storage medium 200 and executes encryption and decryption of the log. Encryption and decryption will be substantially managed. Therefore, it is possible to reliably prevent the log including customer personal information and the like from being taken out via the external storage medium without the intention of the terminal device 300 side.

  By the way, if the individual information of the external storage medium 200 does not coincide with the individual information (“ABC”) of the file as a result of the determination in S108 (FIG. 5: S108 NO), the individual information determination means 405 indicates that. Is notified to the stopping means 409. Upon receiving the notification, the stopping unit 409 stops the use of the multifunction peripheral 100 itself (FIG. 5: S115). In this case, for example, there is a high possibility that another user is attempting to store the log by copying only the file to another external storage medium other than the external storage medium 200. Therefore, the user can connect the external storage medium to the multifunction peripheral 100. The action attached to is regarded as an illegal action and the subsequent processing is stopped. Thereby, security can be further enhanced. Further, the stopping unit 409 may be configured to issue a warning or an alarm, notify the terminal device of the management company to that effect via the network, or display an error screen on the touch panel 201, for example. .

  If it is determined in S113 that the individual information (“ABC”) in the external storage medium 200 does not match the individual information in the table (“Table C”) (FIG. 5: S113 NO), the decrypting means 408 is obtained. However, a message indicating that the external storage medium 200 is inappropriate is displayed on the liquid crystal display or the like of the terminal device 300, and the decoding process is stopped as in S115 described above (FIG. 5: S115). As a result, it is possible to prevent other users from copying and decrypting only the encrypted log to another external storage medium.

  In S109, if the result of the determination is that the current date and time is not within the expiration date of the file (FIG. 5: S109 NO), the expiration date determination means 406 notifies the stop means 409 to that effect. Upon receiving the notification, as shown in FIG. 2, the stopping unit 409 displays an error screen on the touch panel 201 of the operation unit 102 indicating that the expiration date has expired and the log cannot be stored (FIG. 5: S116). . Thereby, it is possible to suppress the expiration date in which the log can be stored in the external storage medium 200, and to further increase the security.

  If the expiration date has expired, the user can return to S101 again and store a new file in the external storage medium 200 using the terminal device 300, thereby allowing the log to be stored.

  As described above, according to the present invention, when the external storage medium 200 is loaded, the terminal device 300 causes the external storage medium 200 to store a file including individual information registered in advance in the external storage medium 200. When the file creation means 402 for creating the table including the individual information and the external storage medium 200 storing the encrypted log are attached, the individual information of the external storage medium 200 is converted to the individual information of the table. And a decrypting unit 408 for decrypting the encrypted log after determining that they match, and when the MFP 100 is loaded with the external storage medium 200 storing the file, the external storage medium 200 Individual information determination means 405 for determining whether or not the individual information matches the individual information of the file, and as a result of the determination, And encryption means 407 for encrypting the log of the multi-function peripheral 100 and storing the encrypted log in the external storage medium 200 when the different information matches the individual information of the file. .

  This makes it possible to easily increase the number of external storage media when necessary while limiting the number of external storage media capable of storing logs.

  In the embodiment of the present invention, the steps of the present invention are executed when the external storage medium 200 is attached to the terminal device 300 or the multifunction peripheral 100. However, other configurations may be used. In other words, each step may proceed by displaying a screen for guiding the user at each step or by accepting an input of a key corresponding to the user's intention display.

  In the embodiment of the present invention, the image processing system 1 is configured to include each unit. However, a program that realizes each unit may be stored in a storage medium, and the storage medium may be provided. . In this configuration, the terminal device or the multifunction device is caused to read the program, and the terminal device or the multifunction device realizes the respective units. In that case, the program itself read from the recording medium exhibits the effects of the present invention. Furthermore, it is possible to provide a method for storing the steps executed by each means in a hard disk.

  As described above, the image processing system and the log recording method according to the present invention include an image processing system including a copying machine, a printer, and a terminal device, a tablet terminal device, a laptop computer, a portable terminal device, etc. It is useful as a system, and is effective as an image processing system and log recording method capable of easily increasing the number of external storage media when necessary while limiting the number of external storage media capable of storing logs. .

DESCRIPTION OF SYMBOLS 1 Image processing system 100 MFP 200 External storage medium 300 Terminal device 401 Control means 402 File creation means 403 Storage means 404 Detection means 405 Individual information determination means 406 Validity period determination means 407 Encryption means 408 Decoding means 409 Stop means

Claims (3)

An image processing system having a terminal device to which an external storage medium can be attached and an image processing device,
When the external storage medium is attached to the terminal device, a file including individual information that can uniquely identify the external storage medium registered in advance in the external storage medium is stored in the external storage medium. File creation means for storing and creating a table including the individual information;
Decryption means for decrypting the encrypted log after determining that the individual information of the external storage medium matches the individual information of the table when an external storage medium storing the encrypted log is attached And
When the image processing apparatus is loaded with an external storage medium storing the file, individual information determination means for determining whether the individual information of the external storage medium matches the individual information of the file;
As a result of the determination, when the individual information of the external storage medium matches the individual information of the file, the encryption of the log of the image processing apparatus and storing the encrypted log in the external storage medium An image processing system comprising: means. The image processing apparatus further includes expiration date determination means for determining whether or not the current date and time is within the expiration date of the file when the external storage medium storing the file is attached,
The file creation means determines a predetermined expiration date, creates a file in which the expiration date is associated with the individual information, stores the file in the external storage medium,
The encryption unit encrypts the log of the image processing apparatus and stores the encrypted log in an external storage medium when the current date and time is within the expiration date of the file as a result of the determination. Item 8. The image processing system according to Item 1. A log storage method for an image processing system having a terminal device to which an external storage medium can be attached and an image processing device,
When the external storage medium is attached to the terminal device, a file including individual information that can uniquely identify the external storage medium registered in advance in the external storage medium is stored in the external storage medium. And creating a table including the individual information,
Determining whether or not the individual information of the external storage medium matches the individual information of the file when the external storage medium storing the file is attached to the image processing apparatus;
As a result of the determination, when the individual information of the external storage medium matches the individual information of the file, encrypting the log of the image processing apparatus and storing the encrypted log in the external storage medium; ,
When the external storage medium storing the encrypted log is attached to the terminal device, it is determined that the individual information of the external storage medium matches the individual information of the table, and then the encrypted log A log storage method comprising: a step of decrypting.