JP2005044308A - Encrypted medium image processor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a person except a regular user from illicitly reading or rewriting data in the reproduction of a program or the like stored in a storage medium by use of a reproducing unit. <P>SOLUTION: The encrypted medium image processor enables a regular right holder to easily execute the program or the like while preventing access to data or the like by a person having no regular right. Medium image information composed of an execution file for executing the program and a data file used in the execution with the execution file is encrypted. Further, only an execution file having the access right is accessible to this data file. By doubly preventing the illicit access in this way, an increased security effect is expectable. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an encrypted medium image processing apparatus.

  A recording medium represented by an optical disk or the like reproduces a stored program, game, or the like by using a reproducing apparatus main body such as a computer. Furthermore, by exchanging the recording medium, it is possible to execute different programs. At this time, even a person other than a legitimate user can easily access the stored data or program, and can illegally read the data or program or rewrite the data or program. It was.

  Therefore, conventionally, a method for preventing unauthorized access by inputting a password and comparing it with identification information built in a recording medium or a playback device has been performed (see Patent Document 1).

Japanese Patent Laid-Open No. 11-296436

  However, in a method of inputting a password and comparing it with identification information built in a recording medium or a playback device, there is a possibility that a person other than a legitimate user may illegally obtain by analyzing such information, It's hard to say that it's perfect. Moreover, it can be said that the input of the password is complicated for the user.

  In view of such circumstances, the present invention proposes an encrypted medium image processing apparatus that can prevent the copying and access of data by a person without a legitimate authority and can easily execute a program or the like by a person with a legitimate authority. .

  First, as a first step for ensuring security, data to be recorded on a recording medium is encrypted. What is recorded on this recording medium is medium image information including an execution file for actually executing a program and the like, and a data file used when executing the program with this execution file. Here, as a second stage of ensuring security, it is assumed that only an executable file having an access right source can access this data file. As described above, the present invention can be expected to enhance the security effect by double protection against unauthorized access.

  Moreover, the recording medium on which data etc. is recorded can be realized not only in the case of a portable medium such as a CD-ROM but also in the case of a virtual portable medium. You may do that.

  Further, at the time of decryption, it is possible to decrypt only a specific user by using identification information of the user who uses the execution file. Further, the medium image information can be transmitted in response to a transmission request received from another encryption medium image processing apparatus, and at this time, encryption is performed with an encryption key that can be decrypted by the encryption medium image processing apparatus of the transmission destination. You can also.

  The encrypted medium image processing apparatus of the present invention encrypts medium image information itself composed of an execution file and a data file, and further allows only an execution file having an access right source to access the data file. It can be expected to double the defense against unauthorized access and enhance the security effect.

  In addition, the encryption medium image processing apparatus is effective in that it can be widely used while maintaining security by using portable recording medium, virtual recording medium, communication, and medium image information from various media. Have.

  Furthermore, by identifying and decrypting the user, a person other than the specific user identified by the user identification information cannot decrypt the encrypted media image information, ensuring security. Is planned.

  In addition, by receiving a request for transmission of encrypted medium image information from another encryption medium image processing apparatus and transmitting the encrypted medium image information corresponding to the transmission request, the required encrypted medium image information can be immediately obtained. Furthermore, since it is possible to exchange encrypted medium image information between encrypted medium image processing apparatuses, it can be used for general purposes and is highly convenient.

  The best mode for carrying out each invention will be described below. Note that the present invention is not limited to these embodiments, and can be implemented in various modes without departing from the spirit of the present invention.

  In the first embodiment, claims 1 and 8 will be mainly described.

  The second embodiment will mainly describe claim 2 and the like.

  The third embodiment will mainly describe claim 3 and the like.

  The fourth embodiment will mainly describe claim 4 and the like.

  In the fifth embodiment, claim 5 will be mainly described.

  In the sixth embodiment, claims 6 and 9 will be mainly described.

  The seventh embodiment will mainly describe claim 7 and the like.

<< Embodiment 1 >>

  <Embodiment 1: Overview>

  The first embodiment will be described. The present embodiment is an encrypted medium image processing apparatus that is permitted to be accessed only when an executable file acquired from decrypted medium image information has a right to access a data file.

  FIG. 1 shows an example of the concept of this embodiment. The encryption medium image processing device here is assumed to be a playback device that plays back a game stored on a CD-ROM.

  First, Mr. A who is a legitimate user inserts a CD-ROM into the encryption medium image processing apparatus in order to play a game. At this time, the game program which is the medium image information is encrypted and stored in the CD-ROM. Therefore, the encrypted medium image processing apparatus that has acquired the encrypted medium image information (game program) from the CD-ROM needs to perform decryption.

  Here, the medium image information includes an execution file for actually executing a game program and the like, and a data file used when executing the game program with the execution file. Specifically, the data file corresponds to a character appearing in the game, data for configuring the background, and the like, and the execution file corresponds to a character necessary for each scene and an algorithm such as its action.

  The encrypted medium image processing apparatus acquires an execution file from the medium image information that has been decrypted, and determines whether the execution file has a right of access to the data file. At this time, it is assumed that the access right is registered in the CD-ROM as having the right when Mr. A purchases this CD-ROM.

  In the case of a determination result that the execution file has the access right to the data file, the execution file permits the access to the data file and can play the game, but the determination result that the execution file does not have the access right In this case, the game cannot be played.

  <Embodiment 1: Configuration>

  An example of functional blocks in this embodiment is shown in FIG.

  The “encrypted medium image processing apparatus” (0200) of this embodiment shown in FIG. 2 includes an “encrypted medium image information acquisition unit” (0201), a “decryption unit” (0202), and an “execution file acquisition unit”. ”(0203),“ determination unit ”(0204), and“ access permission unit ”(0205).

  Each unit, which is a component of the present invention, is configured by either hardware, software, or both hardware and software. For example, as an example for realizing these, when a computer is used, hardware composed of a CPU, a memory, a bus, an interface, a peripheral device, and the like and software executable on these hardware are listed. be able to.

  Specifically, the functions of the respective units are realized by sequentially executing the programs developed on the memory, by processing, storing, and outputting data on the memory and data input through the interface. (The same applies throughout this specification.)

  The “encrypted medium image information acquisition unit” (0201) acquires encrypted medium image information. “Media image information” is information indicating the content (image) of a recording medium or the like as it is, and includes an execution file and a data file. It is assumed that the information is obtained from a portable recording medium such as a CD-ROM or DVD, but in addition, a virtual portable recording medium such as a virtual CD-ROM or medium image information by communication without using a recording medium. You may be able to get These details will be described in the following embodiments.

  The “execution file” is a file for actually executing a program or the like, and the “data file” is a file used when executing the program with the execution file. For example, if the media image information is a game program, the data file is a character that appears in the game, data for configuring the background, etc., and the execution file is an algorithm such as the character required for each scene and its operation Is applicable. Only when both the execution file and the data file are used, the program or the like can be executed, and the program cannot be executed by the execution file alone or the data file alone.

  The “decryption unit” (0202) decrypts the encrypted medium image information acquired by the encrypted medium image information acquisition unit (0201). If the user has a legitimate title, it can be easily decrypted by a method corresponding to the encrypted method. By performing the decryption process here, security can be ensured.

  The “execution file acquisition unit” (0203) acquires the execution file from the decrypted medium image information decrypted by the decryption unit (0202). Of the medium image information composed of the execution file and the data file, the execution file can be accessed by the decryption process described above. However, data files can only be accessed in certain cases.

  The “determination unit” (0204) determines whether the execution file acquired by the execution file acquisition unit (0203) has the authority to access the data file. The “right to access” is a right that the executable file has when the access to the data file is permitted. By rightly purchasing the medium image information or the recording medium storing the medium image information, etc. You can have this title.

  For example, it is assumed that the determination is made by analyzing information on information indicating that the source of access right is included in the header portion of the executable file. In addition, a case of inputting a password, a user ID, or the like may be included. Only by accessing both the executable file and the data file, it is possible to reproduce the program, etc. Therefore, it is determined whether or not the access right is possessed, and it is ensured that the one that does not have the rights is excluded. . It is also possible to prevent impersonation of the right holder by illegally copying the executable file.

  The “access permission unit” (0205) permits access to the data file by the execution file when the determination result by the determination unit (0204) is that of having the title. When access is permitted, the execution file and data file can be used to execute a program that is medium image information, and to reproduce a game or music.

  <Embodiment 1: Flow of processing>

  FIG. 3 shows an example of the flow of processing in the first embodiment. The encryption medium image processing method according to this embodiment includes the following steps.

  First, encrypted media image information consisting of an executable file and a data file used by the executable file is acquired (encrypted media image information acquisition step S0301).

  Next, the encrypted medium image information acquired in the encrypted medium image information acquisition step (S0301) is decrypted (decryption step S0302).

  Further, the execution file is acquired from the decoding medium image information decoded in the decoding step (S0302) (execution file acquisition step S0303).

  Thereafter, it is determined whether or not the execution file acquired in the execution file acquisition step (S0303) has the authority to access the data file (determination step S0304).

  Finally, if the result of the determination in the determination step (S0304) is that the title has authority, access to the data file by the execution file is permitted (access permission step S0305). On the other hand, if the determination result in the determination step (S0304) is not the one having the title, the process is terminated.

  The above processing can be executed by a program to be executed by a computer, and this program can be recorded on a recording medium readable by the computer. (The same applies throughout the specification.)

  <Embodiment 1: Effect>

  The encrypted medium image processing apparatus of the present embodiment encrypts medium image information itself composed of an execution file and a data file in order to ensure security. Further, to ensure security, only the executable file having the access right source can access the data file. As described above, the present invention can be expected to enhance the security effect by double protection against unauthorized access.

<< Embodiment 2 >>

  <Embodiment 2: Overview>

  Embodiment 2 will be described. The present embodiment is an encrypted medium image processing apparatus characterized in that the medium image information is portable medium image information.

  <Embodiment 2: Configuration>

  An example of functional blocks in this embodiment is shown in FIG.

  The “encrypted medium image processing apparatus” (0400) of this embodiment shown in FIG. 4 includes an “encrypted medium image information acquisition unit” (0401), a “decryption unit” (0402), and an “execution file acquisition unit”. ”(0403),“ determination unit ”(0404), and“ access permission unit ”(0405).

  The “encrypted medium image information acquisition unit” (0401) acquires encrypted portable medium image information. “Portable medium image information” is medium image information stored in a portable recording medium such as a CD-ROM. In addition, various types of recording media such as DVD-ROM, MO, and flexible disk may be included.

  The “decryption unit” (0402) decrypts the encrypted portable medium image information acquired by the encryption medium image information acquisition unit (0401).

  The “execution file acquisition unit” (0403) acquires the execution file from the decrypted medium image information decrypted by the decryption unit (0402).

  The “determination unit” (0404) determines whether the execution file acquired by the execution file acquisition unit (0403) has the authority to access the data file.

  The “access permission unit” (0405) permits the execution file to access the data file when the determination result in the determination unit (0404) has the title. When access is permitted, the execution file acquires information necessary for execution from the data file held in the portable medium in which the execution file is included. Security can be ensured by enabling execution only when access is permitted.

  <Embodiment 2: Effect>

  The encryption medium image processing apparatus of the present embodiment can use portable medium image information from a portable recording medium. This has the effect that many portable recording media currently used for general purposes can be utilized while maintaining security.

<< Embodiment 3 >>

  <Embodiment 3: Overview>

  A third embodiment will be described. The present embodiment is an encrypted medium image processing apparatus characterized in that decryption medium image information is held in a virtual portable medium drive unit as a virtual portable medium.

  <Embodiment 3: Configuration>

  An example of functional blocks in this embodiment is shown in FIG.

  The “encryption medium image processing apparatus” (0500) of the present embodiment shown in FIG. 5 includes an “encryption medium image information acquisition unit” (0501), a “decryption unit” (0502), and an “execution file acquisition unit”. ”(0503),“ determination unit ”(0504),“ access permission unit ”(0505), and“ virtual portable medium drive unit ”(0506).

  The “encrypted medium image information acquisition unit” (0501) acquires the encrypted portable medium image information.

  The “decryption unit” (0502) decrypts the encrypted portable medium image information acquired by the encryption medium image information acquisition unit (0501).

  The “virtual portable medium drive unit” (0506) holds the decrypted medium image information decrypted by the decrypting unit (0502) as a virtual portable medium. Here, after the decryption medium image information is held, even if the portable medium is taken out from the encryption medium image processing apparatus, the subsequent processing can be performed using the held decryption medium image information.

  The “execution file acquisition unit” (0503) acquires the execution file from the decrypted medium image information decrypted by the decryption unit (0502).

  The “determination unit” (0504) determines whether or not the execution file acquired by the execution file acquisition unit (0503) has the authority to access the data file.

  The “access permission unit” (0505) permits access to the data file by the execution file when the determination result by the determination unit (0504) is that it has the title. If access is permitted, the execution file included in the portable medium image information acquires information necessary for execution from the data file held in the virtual portable drive unit (0506). Security can be ensured by enabling execution only when access is permitted.

  <Embodiment 3: Effect>

  The encryption medium image processing apparatus of this embodiment can hold the decryption medium image information as a virtual portable medium and can use the portable medium image information. Thus, once the portable medium is read, the stored decryption medium image information can be used even after the portable medium is taken out, so that an apparatus that is highly convenient for the user can be provided.

<< Embodiment 4 >>

  <Embodiment 4: Overview>

  A fourth embodiment will be described. The present embodiment is an encrypted medium image processing apparatus characterized by acquiring medium image information through communication.

  <Embodiment 4: Configuration>

  The functional blocks in this embodiment are the same as those shown in FIG.

  The “encrypted medium image processing apparatus” (0200) of this embodiment shown in FIG. 2 includes an “encrypted medium image information acquisition unit” (0201), a “decryption unit” (0202), and an “execution file acquisition unit”. ”(0203),“ determination unit ”(0204), and“ access permission unit ”(0205).

  The “encrypted medium image information acquisition unit” (0201) acquires the encrypted medium image information by communication. Communication is assumed to be performed via a LAN (a comprehensive information communication network within a limited range), the Internet, or the like. The acquisition of the encrypted medium image information can be performed more easily by using communication. On the other hand, since encryption is performed, security can be maintained.

  The processing of other parts is the same as that of the first embodiment.

  <Embodiment 4: Effect>

  The encrypted medium image processing apparatus according to the present embodiment acquires medium image information through communication. Thereby, the encrypted medium image information can be acquired more simply and immediately. In addition, since medium image information such as a game that can be distributed only with a real recording medium can be distributed by communication, it is highly convenient.

<< Embodiment 5 >>

  <Embodiment 5: Overview>

  Embodiment 5 will be described. The present embodiment is an encrypted medium image processing apparatus characterized by identifying and decrypting a user.

  <Embodiment 5: Configuration>

  An example of functional blocks in the present embodiment is shown in FIG.

  The “encrypted medium image processing apparatus” (0600) of this embodiment shown in FIG. 6 includes an “encrypted medium image information acquisition unit” (0601), a “decryption unit” (0602), and an “executable file acquisition unit”. ”(0603),“ determination unit ”(0604),“ access permission unit ”(0605), and“ user identification information holding unit ”(0606).

  The “user identification information holding unit” (0606) holds user identification information. “User identification information” is information for identifying a person who uses the executable file, and is unique information assigned to each user. By preliminarily holding the user identification information of a legitimate user in the encryption medium image processing apparatus, unauthorized use by a person other than the legitimate user can be prevented. At this time, it is assumed that the user identification information is held by registration by an authorized user.

  The user identification information corresponds to, for example, a user ID or a password. In addition, information for identifying a user through physical characteristics such as a fingerprint may be applicable.

  The “decryption unit” (0602) decrypts using the user identification information. Specifically, a case where the user identification information is a key for decryption is assumed. By using the user identification information as a decryption key, a person other than the specific user cannot decrypt the encrypted medium image information, and security can be ensured.

  The processing of other parts is the same as that of the first embodiment.

  <Embodiment 5: Effect>

  The encryption medium image processing apparatus of this embodiment can identify and decrypt a user. As a result, persons other than the specific user identified by the user identification information cannot decrypt the encrypted medium image information, and security is ensured.

<< Embodiment 6 >>

  <Embodiment 6: Overview>

  Embodiment 6 will be described. This embodiment accepts a request for transmission of encrypted medium image information from another encrypted medium image processing apparatus, and transmits encrypted medium image information corresponding to the transmission request. Device.

  FIG. 7 is a diagram showing an example of the concept of the present embodiment. The encryption medium image processing apparatus (apparatus A) according to the present embodiment acquires and holds encryption medium image information in advance. The acquisition means may be in any form such as a portable recording medium, a virtual portable medium, or communication as already described.

  On the other hand, the other encryption medium image processing device (device B) makes a transmission request for the encryption medium image information (1). When the device A receives the transmission request, the device A transmits the stored encrypted medium image information to the device B accordingly (2). Thereby, it is possible to exchange encrypted medium image information in the encrypted medium image processing apparatus, and it can be expected that versatility is further improved.

  <Embodiment 6: Configuration>

  An example of functional blocks in this embodiment is shown in FIG.

  The “encryption medium image processing apparatus” (0800) of the present embodiment shown in FIG. 8 includes an “encryption medium image information acquisition unit” (0801), a “decryption unit” (0802), and an “execution file acquisition unit”. ”(0803),“ determination unit ”(0804),“ access permission unit ”(0805),“ encrypted medium image information holding unit ”(0806), and“ transmission request reception unit ”(0807) And “encrypted medium image information transmission unit” (0808).

  The “encrypted medium image information holding unit” (0806) holds the encrypted medium image information acquired by the encrypted medium image information acquiring unit (0801).

  The “transmission request accepting unit” (0807) accepts a transmission request from another encrypted medium image processing apparatus which is another encrypted medium image processing apparatus. The “transmission request” is a request for transmission of the encrypted medium image information held in the encrypted medium image information holding unit. The transmission request may include information for specifying the requested encryption medium image information, information for identifying the transmission destination and the transmission source encryption medium image processing apparatus, and the like.

  When a transmission request is accepted, all transmission requests may be received, or a case where the transmission request is received only from a specific encryption medium image processing apparatus may be included.

  Although not specified, it is assumed that the encryption medium image processing apparatus that requests transmission includes a transmission request transmission unit.

  The “encrypted medium image information transmission unit” (0808) stores the encrypted medium image stored in the encrypted medium image information storage unit (0806) when the transmission request reception unit (0807) receives the transmission request. Send information. The encrypted medium image information can be transmitted to the encrypted medium image processing apparatus that is the transmission source of the transmission request.

  <Sixth Embodiment: Process Flow>

  FIG. 9 shows an example of the flow of processing in the sixth embodiment. The encryption medium image processing method according to this embodiment includes the following steps.

  First, encrypted media image information consisting of an executable file and a data file used by the executable file is acquired (encrypted media image information acquisition step S0901).

  Next, a transmission request that is a request for transmission of encrypted medium image information is received from another encrypted medium image processing apparatus that is another encrypted medium image processing apparatus (transmission request reception step S0902).

  Further, it is determined whether or not the transmission request is accepted in a transmission request reception step (S0902) (determination step S0903).

  If it is determined in the determination step (S0903) that the transmission request has been received, the encrypted medium image information acquired in the encrypted medium image information acquisition step (S0901) is transmitted (encrypted medium image information). Transmission step S0904). On the other hand, in the determination step (S0903), when it is determined that the transmission request is not received, the processing of the transmission request reception step (S0902) may be repeated.

  <Embodiment 6: Effect>

  The encryption medium image processing apparatus according to the present embodiment can receive a request for transmission of encryption medium image information from another encryption medium image processing apparatus, and can transmit the encryption medium image information corresponding to the transmission request. . As a result, the necessary encrypted medium image information can be obtained immediately, and the encrypted medium image information can be exchanged between the encrypted medium image processing apparatuses. High equipment can be provided.

<< Embodiment 7 >>

  <Embodiment 7: Overview>

  A seventh embodiment will be described. This embodiment is an encryption medium image processing apparatus characterized in that encryption of encryption medium image information is encrypted with an encryption key that can be decrypted by the other encryption medium image processing apparatus.

  <Embodiment 7: Configuration>

  The functional blocks in this embodiment are the same as those already shown in FIG.

  The “encryption medium image processing apparatus” (0800) of the present embodiment shown in FIG. 8 includes an “encryption medium image information acquisition unit” (0801), a “decryption unit” (0802), and an “execution file acquisition unit”. ”(0803)”, “determination unit” (0804), “access permission unit” (0805), “encrypted medium image information holding unit” (0806), “transmission request reception unit” (0807), “Encrypted medium image information transmission unit” (0808).

  The “encrypted medium image information transmission unit” (0808) transmits the encrypted medium image information when receiving a transmission request from another encrypted medium image processing apparatus. The encryption is performed using an encryption key that can be decrypted by the other encryption medium image processing apparatus. That is, after the other encryption medium image processing apparatus acquires the encryption medium image information, it can be decrypted accurately.

  The processing of each other part is the same as in the sixth embodiment.

  <Embodiment 7: Effect>

  The encryption medium image processing apparatus of the present embodiment can perform encryption with an encryption key that can be decrypted by the other party in response to a transmission request from another encryption medium image processing apparatus. As a result, security can be ensured by performing encryption with a key that cannot be decrypted by anyone other than those who have a trust relationship.

Conceptual diagram for explaining the first embodiment Functional block diagram for explaining the first embodiment The figure explaining the flow of processing of Embodiment 1. Functional block diagram for explaining the second embodiment Functional block diagram for explaining the third embodiment Functional block diagram for explaining the fifth embodiment Conceptual diagram for explaining the sixth embodiment Functional block diagram for explaining the sixth embodiment The figure explaining the flow of processing of Embodiment 6.

Explanation of symbols

0200 Encrypted media image processing device 0201 Encrypted media image information acquisition unit 0202 Decryption unit 0203 Execution file acquisition unit 0204 Judgment unit 0205 Access permission unit

Claims (9)

An encrypted medium image information acquisition unit that acquires encrypted medium image information including an execution file and a data file used by the execution file;
A decryption unit for decrypting the encrypted medium image information acquired by the encrypted medium image information acquisition unit;
An executable file acquisition unit that acquires the executable file from the decryption medium image information decrypted by the decryption unit;
A determination unit that determines whether the execution file acquired by the execution file acquisition unit has a right to access the data file;
An access permission unit that allows access to the data file by the executable file, when the determination result in the determination unit has the title;
An encryption medium image processing apparatus comprising: The medium image information is portable medium image information,
The encrypted medium image processing apparatus according to claim 1, wherein the execution file acquires information necessary for execution from a data file held in a portable medium including the execution file. A virtual portable medium drive unit that holds the decrypted medium image information as a virtual portable medium;
The encrypted medium image processing apparatus according to claim 2, wherein the execution file included in the portable medium image information acquires information necessary for execution from a data file held in the virtual portable drive unit.   The encryption medium image processing apparatus according to any one of claims 1 to 3, wherein the encryption medium image information acquisition unit acquires encryption medium image information by communication. A user identification information holding unit for holding user identification information for identifying a person who uses the executable file;
The encrypted medium image processing apparatus according to claim 1, wherein the decryption unit decrypts using the user identification information. An encrypted medium image information holding unit for holding the encrypted medium image information acquired by the encrypted medium image information acquiring unit;
A transmission request accepting unit that accepts a transmission request, which is a request for transmitting encrypted medium image information held in the encrypted medium image information holding unit, from another encrypted medium image processing apparatus that is another encrypted medium image processing apparatus; ,
An encrypted medium image information transmitting unit that transmits the encrypted medium image information held in the encrypted medium image information holding unit when the transmission request is accepted by the transmission request accepting unit;
The encryption medium image processing apparatus according to claim 1, comprising:   The encrypted medium image processing apparatus according to claim 6, wherein the encrypted medium image information is encrypted with an encryption key that can be decrypted by the other encrypted medium image processing apparatus. An encrypted medium image information acquisition step for acquiring encrypted medium image information consisting of an executable file and a data file used by the executable file;
A decryption step for decrypting the encrypted medium image information acquired in the encrypted medium image information acquisition step;
An execution file acquisition step of acquiring the execution file from the decryption medium image information decrypted in the decryption step;
A determination step of determining whether the execution file acquired in the execution file acquisition step has a right to access the data file;
An access permission step for permitting access to the data file by the executable file, when the determination result in the determination step is that having the title;
An encryption medium image processing method comprising: An encrypted medium image information acquisition step for acquiring encrypted medium image information consisting of an executable file and a data file used by the executable file;
A transmission request receiving step of receiving a transmission request that is a request for transmission of encrypted medium image information from another encrypted medium image processing apparatus that is another encrypted medium image processing apparatus;
A determination step of determining whether or not the transmission request is accepted in the transmission request reception step;
In the determination step, if it is a determination result that the transmission request has been accepted, an encrypted medium image information transmission step for transmitting the encrypted medium image information acquired in the encrypted medium image information acquisition step;
An encryption medium image processing method comprising:

Images