JP2007128571A - Recording method, information processing device, system, program, and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the security against the alteration of the information recorded on an information recording medium without increasing costs. <P>SOLUTION: When recording a delivery file on a disk for delivery, if another file having the same filename is already recorded in the recordable area of the disk, the delivery file is not recorded unless its filename is changed (Steps 611-623). Thus, the delivery file recorded on the disk is prevented from being overwritten. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a recording method, an information processing apparatus, an information processing system, a program, and a recording medium, and more specifically, a recording method and information processing apparatus for recording information on an information recording medium, and an information processing system including the information processing apparatus. The present invention relates to a program used in the information processing apparatus and a recording medium on which the program is recorded.

  In recent years, so-called electronic delivery has been performed in which information obtained by digitizing documents and images is stored in an information recording medium such as a CD (compact disc) or a DVD (digital versatile disc) and mailed or delivered to a delivery destination. In this electronic delivery, since a plurality of third parties are often interposed between the delivery source and the delivery destination, there is a risk of information being stolen or tampered with. Various methods for preventing unauthorized access to information recorded on an information recording medium have been proposed (see, for example, Patent Documents 1 to 7).

  However, even if the methods disclosed in Patent Literature 1 to Patent Literature 7 are adopted, there is a possibility that the information is falsified if the information is illegally accessed.

JP-A-5-257816 JP-A-6-295521 JP-A-9-134259 JP-A-9-134260 JP-A-11-134650 JP-A-11-134719 JP-A-11-134413

  The present invention has been made under such circumstances, and a first object of the present invention is a recording method capable of improving safety against falsification of information recorded on an information recording medium without incurring an increase in cost. And providing an information processing apparatus.

  A second object of the present invention is to provide an information processing system capable of safely transmitting information via a portable information recording medium.

  The third object of the present invention is to provide a program that can be executed by an information processing apparatus and can improve the safety against falsification of information recorded on the information recording medium, and a recording medium on which the program is recorded. There is to do.

  According to a first aspect of the present invention, there is provided a recording method for recording on an information recording medium, the step of determining whether or not a file having the same file name as that of at least one recording target file is recorded on the information recording medium. And a step of encrypting the at least one file to be recorded and recording it on the information recording medium when the file having the same file name is not recorded as a result of the determination.

  According to this, it is determined whether or not a file having the same file name as that of at least one recording target file has already been recorded on the information recording medium, and as a result, a file having the same file name has been recorded on the information recording medium. If not, at least one recording target file is encrypted and recorded on the information recording medium. In this case, the file already recorded on the information recording medium can be prevented from being overwritten by a malicious third party. As a result, the file can be recorded on the information recording medium without increasing the cost. It is possible to improve the safety against falsification of information. Note that “overwriting a file” refers to a file having the same file name (hereinafter referred to as a “second file” for the sake of convenience) and an already recorded file (hereinafter referred to as a “first file” for convenience). In this case, not only when the first file is erased and the second file is recorded, but the first file is not erased and the first file is recorded. Includes a case where the second file is recorded in another area and the first file is invalidated.

  According to a second aspect of the present invention, there is provided an information processing apparatus capable of recording and reproducing information on an information recording medium, wherein a file having the same file name as that of at least one recording target file is not recorded on the information recording medium A control device that encrypts the at least one recording target file into an encrypted file and permits recording; and a recording device that records the encrypted file permitted to be recorded on the information recording medium. It is a processing device.

  According to this, when the file having the same file name as the at least one recording target file is not recorded on the information recording medium by the control device, at least one recording target file is encrypted and recording is permitted. Then, the encrypted file permitted to be recorded is recorded on the information recording medium via the recording device. In this case, the file already recorded on the information recording medium can be prevented from being overwritten by a malicious third party. As a result, the file can be recorded on the information recording medium without increasing the cost. It is possible to improve the safety against falsification of information.

  From a third viewpoint, the present invention includes a first information processing apparatus and a second information processing apparatus, and at least one encryption is performed from the second information processing apparatus to the first information processing apparatus. In the information processing system for transmitting the file via the portable information recording medium, the second information processing apparatus is the information processing apparatus of the present invention.

  According to this, since the second information processing apparatus is the information processing apparatus of the present invention, it is possible to safely transmit information through the portable information recording medium.

  According to a fourth aspect of the present invention, there is provided a program for use in an information processing apparatus capable of recording and reproducing information on an information recording medium, wherein a file having the same file name as that of at least one recording target file is recorded on the information recording medium. A procedure for determining whether or not a file having the same file name is recorded as a result of the determination, and a procedure for encrypting the at least one recording target file and recording it on the information recording medium; Is a program that causes the information processing apparatus to execute.

  According to this, when the program of the present invention is loaded into a predetermined memory and the start address is set in the program counter, is a file having the same file name as at least one recording target file recorded on the information recording medium? If no file having the same file name is recorded as a result of the determination, at least one file to be recorded is encrypted and recorded on the information recording medium. That is, according to the program of the present invention, it is possible to cause the information processing apparatus to execute the recording method of the present invention, and as a result, it is possible to improve the safety against falsification of the information recorded on the information recording medium. .

  From the fifth viewpoint, the present invention is a computer-readable recording medium on which the program of the present invention is recorded.

  According to this, since the program of the present invention is recorded, it is possible to improve safety against falsification of information recorded on the information recording medium by causing the computer to execute the program.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a schematic configuration of an information processing system 10 according to an embodiment of the present invention.

  The information processing system 10 shown in FIG. 1 includes a personal computer (hereinafter also referred to as “personal computer”) 90 installed at a delivery destination and a personal computer 190 installed at a delivery source.

《Delivery destination PC》
The delivery destination personal computer 90 includes a main control device 92, an optical disk device 20, a hard disk device (HDD) 94, an input device 95, a display device 96, a drive interface 97, a USB interface 98, and the like.

  The main controller 92 includes a CPU 92a, a ROM 92b, a RAM 92c, and the like. The CPU 92a controls the entire personal computer 90 based on programs stored in the ROM 92b and the RAM 92c.

  The HDD 94 includes a hard disk 94a and a drive device 94b for driving the hard disk 94a. In the hard disk 94a, various programs described in codes readable by the CPU 92a are recorded. The program recorded on the hard disk 94a is loaded into the RAM 92c as necessary. The hard disk 94a also stores various information related to the delivery source.

  The display device 96 includes a display unit (not shown) using, for example, a CRT, a liquid crystal display (LCD), a plasma display panel (PDP), and the like, and displays various information instructed from the main control device 92.

  The input device 95 includes at least one input medium (not shown) of, for example, a keyboard, a mouse, a tablet, a light pen, a touch panel, and the like, and notifies the main control device 92 of various information input by the user. Note that information from the input medium may be input in a wireless manner. In addition, an example in which the display device 96 and the input device 95 are integrated includes an LCD with a touch panel.

  The drive interface 97 is a bidirectional communication interface between the main control device 92, the optical disc device 20, and the HDD 94, and conforms to standard interfaces such as ATAPI (AT Attachment Packet Interface) and SCSI (Small Computer System Interface). Yes.

  The USB interface 98 is a bidirectional communication interface between the main controller 92 and the USB memory 110, and conforms to a USB (Universal Serial Bus) standard interface.

  The optical disk device 20 records and reproduces information with respect to the set optical disk (here, the optical disk 15) based on an instruction from the main controller 92.

《Delivery source PC》
The delivery source personal computer 190 includes a main control device 192, an optical disk device 120, a hard disk device (HDD) 194, an input device 195, a display device 196, a drive interface 197, a USB interface 198, and the like.

  The main controller 192 includes a CPU 192a, a ROM 192b, a RAM 192c, and the like. The CPU 192a controls the entire personal computer 190 based on programs stored in the ROM 192b and the RAM 192c.

  The HDD 194 includes a hard disk 194a and a driving device 194b for driving the hard disk 194a. In the hard disk 194a, various programs described in codes readable by the CPU 192a are recorded. The program recorded on the hard disk 194a is loaded into the RAM 192c as necessary. Various files for delivery are also recorded on the hard disk 194a.

  The display device 196 includes a display unit (not shown) using, for example, a CRT, an LCD, a PDP, and the like, and displays various information instructed from the main control device 192.

  The input device 195 includes, for example, at least one input medium (not shown) such as a keyboard, a mouse, a tablet, a light pen, and a touch panel, and notifies the main control device 192 of various information input by the user. Note that information from the input medium may be input in a wireless manner. In addition, an example in which the display device 196 and the input device 195 are integrated includes an LCD with a touch panel.

  The drive interface 197 is a bidirectional communication interface between the main controller 192, the optical disc device 120, and the HDD 194, and conforms to a standard interface such as ATAPI (AT Attachment Packet Interface) and SCSI (Small Computer System Interface). Yes.

  The USB interface 198 is a bidirectional communication interface between the main controller 192 and a USB memory, and conforms to a USB (Universal Serial Bus) standard interface.

  The optical disc device 120 records and reproduces information with respect to the set optical disc (here, the optical disc 15) based on an instruction from the main controller 192.

"optical disk"
As shown in FIG. 2A as an example, the optical disk 15 is provided on a read-only area (hereinafter also referred to as “first area” for convenience) and on the outer periphery side of the first area. This is a so-called hybrid disc having a recordable area (hereinafter also referred to as “second area” for convenience).

  Further, the optical disk 15 is assumed to comply with the CD-R standard as an example. Recording on the optical disk 15 is performed by the multi-session method. Therefore, as shown in FIG. 2B as an example, a lead-in area, a data area, and a lead-out area for the first session are formed in the first area. Various programs including a “key recording processing program”, “delivery file recording processing program”, and “delivery file reproduction processing program” are recorded.

《Delivery processing》
Next, a delivery process using the information processing system 10 configured as described above will be described.

1. 3. Delivery disk creation process at delivery destination When an operator inputs a delivery disk creation request via the input device 95, a program corresponding to the flowchart of FIG. 3 stored in the hard disk 94a is loaded into the RAM 92c. The delivery disk creation process starts. It is assumed that the optical disk 15 is already set in the optical disk device 20.

  In the first step 401, a set of public key and private key is generated.

  In the next step 403, the generated public key and secret key are stored in the USB memory 110 via the USB interface 98.

  In the next step 405, the "public key recording processing program" corresponding to the flowchart of FIG. 4 recorded in the first area of the optical disc 15 is loaded into the RAM 92c.

  In the next step 407, the “public key recording processing program” is executed. That is, the head address of the “public key recording processing program” loaded in the RAM 92c is set in the program counter of the CPU 92a, and the process proceeds to step 451.

  In step 451, the public key stored in the USB memory 110 is acquired via the USB interface 98.

  In the next step 453, a new session (here, the second session) is opened.

  In the next step 455, the acquired public key is recorded in the data area of the second session (see FIG. 5).

  In the next step 457, the second session is closed.

  In the next step 459, additional recordable information is recorded in the lead-in area of the second session. Specifically, as shown in FIG. 6, the start time of the next recordable area is recorded in “MIN”, “SEC”, and “FRAME” of the subcode Q frame.

  In the next step 461, it is displayed on the display unit of the display device 96 that the creation of the delivery disc has been completed, and the operator is notified. When the operator confirms the end of creation, the “public key recording processing program” is terminated. Then, the delivery disk creation process ends.

  The delivery disc (optical disc 15) created here is sent to the delivery origin by mail or courier.

2. Delivery file recording process at delivery source An operator sets a delivery disc (optical disc 15) sent from the delivery source to the optical disc device 120, and inputs at least one stored in the hard disc 194a via the input device 195. When a file to be delivered (delivery file) is designated, whether or not the disk is to be closed, and a delivery file recording request is input, a program corresponding to the flowchart of FIG. 7 stored in the hard disk 194a is obtained. , Loaded into the RAM 192c, and the delivery file recording process starts.

  In the first step 501, the “delivery file recording processing program” corresponding to the flowcharts of FIGS. 8 and 9 recorded in the first area of the delivery disk is loaded into the RAM 192c.

  In the next step 503, the “delivery file recording processing program” is executed. That is, the head address of the “delivery file recording processing program” loaded in the RAM 192c is set in the program counter of the CPU 192a, and the process proceeds to step 601.

  In step 601, it is determined whether a file is recorded in the second area of the delivery disc via the optical disc apparatus 120. Here, it is checked whether or not the third session exists in the second area of the delivery disc. If the third session does not exist, it is determined that no file is recorded in the second area, the determination here is denied, and the routine proceeds to step 651. That is, recording is permitted.

  In this step 651, a common key is generated. Here, as an example, a random number is generated using the disk ID of the delivery disk, and a common key is generated based on the random number.

  In the next step 653, the delivery file is encrypted with the common key. That is, the delivery file is encrypted by a common key encryption method (for example, C4 encryption (A4) or Advanced Encryption Standard (AES)).

  In the next step 655, a new session (here, the third session) is opened via the optical disc apparatus 120.

  In the next step 657, the encrypted delivery file is recorded in the data area (see FIG. 10) of the opened session (here, the third session) via the optical disc apparatus 120.

  In the next step 659, the public key recorded in the second area (here, the second session) of the delivery disc is read via the optical disc apparatus 120.

  In the next step 661, the common key is encrypted with the public key. That is, the common key is encrypted by a public key cryptosystem.

  In the next step 663, the encrypted common key is recorded in the data area (in this case, the data area of the third session) where the encrypted delivery file is recorded, via the optical disc device 120.

  In the next step 665, the currently open session (here, the third session) is closed.

  In the next step 667, it is determined whether or not there is a disk close request from the operator. If there is no disk close request, the determination here is denied and the routine proceeds to step 669.

  In this step 669, recordable information is recorded in the lead-in area of the final session (here, the third session). Specifically, as described above, the start time of the next recordable area is recorded in “MIN”, “SEC”, and “FRAME” of the subcode Q frame.

  In the next step 673, the fact that recording of the delivery file has been completed is displayed on the display unit of the display device 196 to notify the operator. When the operator confirms the end of recording, the “delivery file recording processing program” is ended. Then, the delivery file recording process ends.

  Here, the delivery disc (optical disc 15) on which the delivery file is recorded is delivered to the delivery destination by mail or courier. That is, so-called electronic delivery is performed.

  If there is a disk close request in step 667, the determination in step 667 is affirmed, and the process proceeds to step 671.

  In this step 671, the disc is closed. Specifically, “FFh” is recorded in “MIN”, “SEC”, and “FRAME” of the subcode Q frame. Then, the process proceeds to step 673.

  In step 601, if the third session exists, it is determined that the file is recorded in the second area, the determination in step 601 is affirmed, and the process proceeds to step 603.

  In this step 603, the file name of the file recorded in the second area of the delivery disc (hereinafter also referred to as “recorded file” for convenience) is obtained via the optical disc apparatus 120.

  In the next step 605, it is determined whether or not the delivery file includes a file having the same file name as the recorded file. If a file with the same file name is not included, the determination here is denied, and the routine proceeds to step 651. That is, recording is permitted. On the other hand, if a file having the same file name is included, the determination here is affirmed, and the routine proceeds to step 611.

  In step 611, it is determined whether there are a plurality of delivery files. If the delivery file is one file, the determination here is denied, and the process proceeds to step 613.

  In this step 613, the operator is notified via the display unit of the display device 196 whether or not to change the file name of the delivery file. If the operator selects not to change the file name of the delivery file via the input device 195, the determination here is denied and the process proceeds to step 615.

  In this step 615, the fact that the delivery file cannot be recorded is displayed on the display unit of the display device 196 to notify the operator. When the operator confirms that recording is impossible, the “delivery file recording processing program” is terminated. Then, the delivery file recording process ends.

  On the other hand, when the operator selects to change the file name of the delivery file via the input device 195 in the above step 613 and inputs the file name after the change, the determination in step 613 is affirmed, Control goes to step 617.

  In this step 617, the file name of the delivery file is changed to the designated file name. Then, the process proceeds to step 651. That is, recording is permitted. In this case, the delivery file is recorded on the delivery disk with the changed file name.

  If there are a plurality of delivery files in step 611, the determination in step 611 is affirmed, and the process proceeds to step 619.

  In this step 619, whether or not to change the file name of the delivery file whose file name is duplicated with the recorded file (hereinafter also referred to as “duplicate delivery file” for convenience) is displayed via the display unit of the display device 196. To notify the worker. If the operator selects not to change the file name of the duplicate delivery file via the input device 195, the determination here is denied and the process proceeds to step 621.

  In this step 621, the duplicate delivery file is excluded from the delivery target. Then, the process proceeds to step 651. In this case, among the delivery files first designated by the operator, recording is permitted for the delivery files excluding duplicate delivery files, and the files are encrypted and recorded on the delivery disk.

  On the other hand, when the operator selects to change the file name of the duplicate delivery file via the input device 195 and inputs the file name after the change in step 619, the determination in step 619 is affirmed. Then, the process proceeds to step 623.

  In step 623, the file name of the duplicate delivery file is changed to the designated file name. Then, the process proceeds to step 651. That is, recording is permitted. In this case, the duplicate delivery file is recorded on the delivery disk with the changed file name.

3. Delivery file reproduction processing at the delivery destination When the delivery disk (optical disc 12) delivered by the operator is set in the optical disc device 20 and a delivery file reproduction request is input via the input device 95, the delivery file is stored in the hard disk 94a. The program corresponding to the flowchart of FIG. 11 is loaded into the RAM 92c, and the delivery process of the delivery file starts. It is assumed that the USB memory 110 is connected via the USB interface 98.

  In the first step 701, the “delivery file reproduction processing program” corresponding to the flowchart of FIG. 12 recorded in the first area of the delivery disc is loaded into the RAM 92c.

  In the next step 703, the “delivery file reproduction processing program” is executed. That is, the head address of the “delivery file reproduction processing program” loaded in the RAM 92c is set in the program counter of the CPU 92a, and the process proceeds to step 751.

  In step 751, the private key stored in the USB memory 110 is acquired via the USB interface 98.

  In the next step 753, the encrypted common key recorded in the second area of the delivery disc is read out via the optical disc apparatus 20.

  In the next step 755, the encrypted common key is decrypted with the secret key.

  In the next step 757, the encrypted delivery file recorded in the second area of the delivery disc is read via the optical disc apparatus 20.

  In the next step 759, the encrypted delivery file is decrypted with the decrypted common key.

  In the next step 761, the fact that reproduction of the delivery file has been completed is displayed on the display unit of the display device 96 to notify the operator. When the operator confirms the end of reproduction, the “delivery file reproduction processing program” is terminated. Then, the delivery file reproduction process is terminated.

  As is clear from the above description, in the information processing system 10 according to the present embodiment, the first information processing apparatus is realized by the delivery destination personal computer 90 and the second information processing apparatus is realized by the delivery destination personal computer 190. Has been.

  The control device is realized by the main control device 192 and a program executed by the CPU 192a of the main control device 192. In addition, a recording device is realized by the optical disk device 120. That is, the control device is realized by the processing of FIGS.

  A part of the control device realized by the processing according to the program by the CPU 192a may be configured by hardware, or all may be configured by hardware.

  In the present embodiment, the program according to the present invention is implemented by the “delivery file recording processing program” among the programs recorded in the first area (first area) of the optical disc 15 as the recording medium. ing. That is, a procedure for determining by a program corresponding to steps 601 to 605 is performed, and a procedure for recording a recording target file by a program corresponding to step 657 is performed. In addition, a procedure for recording a recording target file whose file name has been changed by a program corresponding to step 617, step 623, and step 657 is performed, and a part of the recording target file is excluded by a program corresponding to step 621 and step 657. A procedure for recording a file to be recorded has been implemented. Further, a procedure for recording information permitting additional writing is executed by a program corresponding to step 669.

  In addition, the recording method according to the present invention is executed in the delivery file recording process at the delivery source. That is, the process of determining by the process of steps 601 to 605 is executed, and the process of recording the recording target file is executed by the process of step 657. In addition, a process of recording the recording target file whose file name has been changed by the processing of Step 617, Step 623, and Step 657 is executed, and the recording target file excluding some recording target files is processed by the processing of Step 621 and Step 657. A recording process is being performed. Furthermore, the process of recording the information which permits additional writing by the process of step 669 is performed.

  As described above, according to the information processing system 10 according to the present embodiment, in the delivery file recording process at the delivery source, a file having the same file name as the delivery file (at least one recording target file) is delivered to the delivery disk ( It is determined whether or not the information recording medium) exists in the second area (second area), and if a file having the same file name does not exist in the second area, the delivery file is recorded in the second area. ing. As a result, it is possible to prevent the encrypted delivery file recorded in the second area from being overwritten by a malicious third party, and as a result, the delivery disk is not increased in cost. It is possible to improve safety against alteration of recorded information.

  Further, according to the present embodiment, in the delivery file recording process at the delivery source, when there is one delivery file and a file having the same file name as the delivery file exists in the second area, the delivery file When the file name is changed, the delivery file is recorded in the second area. As a result, it is possible to prevent the encrypted delivery file recorded in the second area from being overwritten.

  According to the present embodiment, in the delivery file recording process at the delivery source, when there are a plurality of delivery files and a file having the same file name as a part of the delivery files exists in the second area, When the file names of some delivery files are not changed, the delivery files are not recorded. As a result, it is possible to prevent the encrypted delivery file recorded in the second area from being overwritten.

  According to the present embodiment, in the delivery file recording process at the delivery source, when there are a plurality of delivery files and a file having the same file name as a part of the delivery files exists in the second area, When the file names of some delivery files are changed, the delivery files are also recorded in the second area. As a result, it is possible to prevent the encrypted delivery file recorded in the second area from being overwritten.

  In addition, according to the present embodiment, in the delivery file recording process at the delivery source, additional recordable information (information permitting additional recording) is recorded in the second area, so that the delivery disk can be electronically delivered multiple times. It becomes possible to use for.

  It should be noted that at least one of the “public key recording processing program” and the “delivery file reproduction processing program” in the above embodiment may be recorded on the hard disk 94a.

  Further, the “delivery file recording processing program” may be recorded on the hard disk 194a. In this case, when the delivery file recording process is requested, the “delivery file recording process program” is loaded from the hard disk 194a into the RAM 192c.

  Furthermore, the program according to the present invention may be recorded on another recording medium (for example, an optical disk other than a delivery disk, an MO, a memory card, a USB memory, a flexible disk, etc.). In this case, the program according to the present invention is loaded into the RAM 192c via the playback device (or dedicated interface) corresponding to each recording medium. Further, the program according to the present invention may be loaded into the RAM 192c via a network (LAN, intranet, Internet, etc.). In short, the program according to the present invention may be loaded into the RAM 192c.

  In the above embodiment, the case where the public key is recorded in the second area of the delivery disk in the delivery disk creation process at the delivery destination has been described. However, the present invention is not limited to this. A public key may be recorded on the information recording medium. For example, the public key may be recorded in a public key USB memory prepared separately from the USB memory 110. In this case, the public key USB memory is sent to the delivery source together with the delivery disk. The delivery source acquires the public key from the sent USB memory instead of the second area of the delivery disk in the delivery file recording process at the delivery source.

  In the above-described embodiment, the case where the optical disk 15 conforms to the CD-R standard has been described. However, the present invention is not limited to this, and a DVD corresponding to light having a wavelength of about 660 nm and light having a wavelength of about 405 nm It may conform to any standard of the next generation information recording medium that supports it. If the optical disc 15 conforms to the DVD + R standard, the recordable information is recorded in the intro area of the final session. The second area may be a rewritable area.

  Moreover, although the case where information was recorded by the multi-session method has been described in the above embodiment, the present invention is not limited to this.

  Further, the optical disk 15 may be a single-layer disk having only one recording layer or a multilayer disk having a plurality of recording layers. Furthermore, an optical disc in which a recording layer conforming to the CD standard and a recording layer conforming to the DVD standard are mixed may be used.

  Moreover, although the said embodiment demonstrated the case where an optical disk was used as an information recording medium, it is not limited to this. In short, any information recording medium having a read-only area and a recordable area may be used.

  As described above, the recording method and the information processing apparatus of the present invention are suitable for improving the safety against falsification of information recorded on the information recording medium without increasing the cost. The information processing system of the present invention is suitable for safely transmitting information via a portable information recording medium. In addition, the program and the storage medium of the present invention are suitable for improving the safety against falsification of information recorded on the information recording medium in the information processing apparatus.

It is a block diagram which shows the structure of the information processing system which concerns on one Embodiment of this invention. 2A and 2B are diagrams for explaining the hybrid disk. 7 is a flowchart for explaining delivery disk creation processing in the personal computer 90 of FIG. 1. FIG. 4 is a flowchart for explaining a “public key recording processing program” in FIG. 3. FIG. It is a figure for demonstrating a 2nd session. It is a figure for demonstrating a subcode Q frame. It is a flowchart for demonstrating the recording process of the delivery file in the personal computer 190 of FIG. FIG. 8 is a flowchart (part 1) for explaining the “delivery file recording processing program” in FIG. 7; FIG. 8 is a flowchart (part 2) for explaining the “delivery file recording processing program” in FIG. 7; It is a figure for demonstrating a 3rd session. It is a flowchart for demonstrating the reproduction process of the delivery file in the personal computer 90 of FIG. 12 is a flowchart for explaining a “delivery file reproduction processing program” in FIG. 11;

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Information processing system, 15 ... Optical disk (information recording medium, recording medium), 90 ... Personal computer (first information processing apparatus), 120 ... Optical disk apparatus (recording apparatus), 190 ... Personal computer (information processing apparatus, second Information processing device), 192... Main control device (control device, computer).

Claims (24)

A recording method for recording on an information recording medium,
Determining whether or not a file having the same file name as at least one recording target file is recorded on the information recording medium;
A step of encrypting the at least one recording target file and recording it on the information recording medium when a file having the same file name is not recorded as a result of the determination.   If the file name of the at least one recording target file is changed when the file having the same file name is recorded as a result of the determination, the at least one recording target file is encrypted and the changed The recording method according to claim 1, further comprising a step of recording the information recording medium with a file name. The at least one recording target file is a plurality of recording target files;
As a result of the determination, when a file having the same file name as a part of the plurality of recording target files is recorded, the part of the recording target files among the plurality of recording target files is changed. The recording method according to claim 1, further comprising a step of encrypting a recording target file to be excluded and recording the file on the information recording medium. The at least one recording target file is a plurality of recording target files;
As a result of the determination, when a file having the same file name as a part of the plurality of recording target files is recorded, the file name of the part of the recording target files is changed. The recording method according to claim 1, further comprising a step of encrypting the plurality of recording target files and recording the encrypted files on the information recording medium.   The recording method according to claim 1, further comprising a step of recording on the information recording medium information permitting additional recording on the information recording medium. The information recording medium is an information recording medium conforming to a CD-R standard, and the at least one recording target file is recorded by a multi-session method,
6. The recording method according to claim 5, wherein in the step of recording the information permitting additional recording on the information recording medium, the information permitting the additional recording is recorded in a lead-in area of a final session. The information recording medium is an information recording medium compliant with the DVD + R standard, and the at least one recording target file is recorded by a multi-session method,
6. The recording method according to claim 5, wherein in the step of recording the information permitting additional recording on the information recording medium, the information permitting the additional recording is recorded in an intro area of a final session. An information processing apparatus capable of recording and reproducing information on an information recording medium,
A control device that encrypts the at least one recording target file into an encrypted file and permits recording when the file having the same file name as the at least one recording target file is not recorded on the information recording medium;
And a recording device that records the encrypted file permitted to be recorded on the information recording medium.   When the file name of the at least one recording target file is changed when a file having the same file name as that of the at least one recording target file is recorded on an information recording medium, the control device further changes the at least one recording target file. 9. The information processing apparatus according to claim 8, wherein one recording target file is encrypted to be an encrypted file, and recording is permitted. The at least one recording target file is a plurality of recording target files;
The control device further includes the part of the plurality of recording target files when a file having the same file name as that of a part of the recording target files is recorded on the information recording medium. 9. The information processing apparatus according to claim 8, wherein the recording target file excluding the recording target file is encrypted to be an encrypted file, and recording is permitted. The at least one recording target file is a plurality of recording target files;
The control device further includes a file name of the part of the recording target files when a file having the same file name as the part of the recording target files of the plurality of recording target files is recorded on the information recording medium. 9. The information processing apparatus according to claim 8, wherein when changed, the plurality of recording target files are encrypted to be encrypted files, and recording is permitted.   12. The control device according to claim 8, wherein the control device further records information permitting additional recording on the information recording medium, on the information recording medium via the recording device. 13. Information processing device. The information recording medium is an information recording medium conforming to a CD-R standard, and the at least one recording target file is recorded by a multi-session method,
The information processing apparatus according to claim 12, wherein the information allowing the additional recording is recorded in a lead-in area of a final session. The information recording medium is an information recording medium compliant with the DVD + R standard, and the at least one recording target file is recorded by a multi-session method,
The information processing apparatus according to claim 12, wherein the information allowing the additional writing is recorded in an intro area of a final session. An information recording medium including a first information processing device and a second information processing device, and having at least one encrypted file from the second information processing device to the first information processing device and having portability In an information processing system that communicates via
The information processing system according to claim 8, wherein the second information processing apparatus is the information processing apparatus according to claim 8. A program used for an information processing apparatus capable of recording and reproducing information on an information recording medium,
A procedure for determining whether or not a file having the same file name as that of at least one recording target file is recorded on the information recording medium;
A program for causing the information processing apparatus to execute a procedure of encrypting the at least one recording target file and recording it on the information recording medium when a file having the same file name is not recorded as a result of the determination.   If the file name of the at least one recording target file is changed when the file having the same file name is recorded as a result of the determination, the at least one recording target file is encrypted and the changed The program according to claim 16, further causing the information processing apparatus to execute a procedure of recording on the information recording medium with a file name. The at least one recording target file is a plurality of recording target files;
As a result of the determination, when a file having the same file name as a part of the plurality of recording target files is recorded, the part of the recording target files among the plurality of recording target files is changed. The program according to claim 16, further causing the information processing apparatus to execute a procedure of encrypting a recording target file to be excluded and recording the encrypted file on the information recording medium. The at least one recording target file is a plurality of recording target files;
As a result of the determination, when a file having the same file name as a part of the plurality of recording target files is recorded, the file name of the part of the recording target files is changed. The program according to claim 16, further causing the information processing apparatus to execute a procedure of encrypting the plurality of recording target files and recording the encrypted files on the information recording medium.   The program according to any one of claims 16 to 19, further causing the information processing apparatus to execute a procedure of recording information permitting additional recording on the information recording medium on the information recording medium. The information recording medium is an information recording medium conforming to a CD-R standard, and the at least one recording target file is recorded by a multi-session method,
The information processing apparatus is configured to cause the information processing apparatus to execute a procedure for recording the information allowing the additional recording in a lead-in area of a final session as a procedure for recording the information allowing the additional recording on the information recording medium. 20. The program according to 20. The information recording medium is an information recording medium compliant with the DVD + R standard, and the at least one recording target file is recorded by a multi-session method,
21. The information processing apparatus is caused to execute a procedure for recording the information for permitting additional writing in an intro area of a final session as a procedure for recording the information for permitting additional recording on the information recording medium. The program described in.   A computer-readable recording medium on which the program according to any one of claims 16 to 22 is recorded.   24. The recording medium according to claim 23, comprising a read-only first area in which the program is recorded and a second area in which recording is possible.

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