JP2003281476A - Communication system of ic card with cpu, ic card with cpu, management center and reading apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent communication information from being illegally obtained and decoded by a third party in communication between a management center and an IC card with a CPU. <P>SOLUTION: Since value information is transmitted to and received from the management center through a reading apparatus with the IC card with a CPU storing a plurality of encoding programs, a selection program, a plurality of decoding programs and a value information storage area and an encoding program selected by the selection program from among the plurality of encoding programs by each transmission unit is used, the plurality of encoding programs are used for transmission and reception. The plurality of encoding programs extracted from many kinds of encoding programs stored in the management center are stored in each IC card with a CPU. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, in order to prevent unauthorized acquisition of communication information by a third party, encrypts communication information by using several kinds of encryption programs that are generally different for each transmission unit, and then performs communication. The present invention relates to an IC card communication system with a CPU, an IC card with a CPU, a management center, and a reading device.

[0002]

2. Description of the Related Art Recently, the use of an IC card with a CPU is
It is expected to be used as an information processing system that requires a high degree of security because it has an information processing function, not just as an information recording medium.

Information stored in a card such as an IC card with a CPU, an IC card, a credit card, a cash card, a debit card, or updated information is encrypted,
Although it communicates with the management center through the reading device, it protects the confidentiality from being compromised even if it is illegally obtained by a third party. In the current situation, one or two types of small number of encryptions are repeatedly used for information communication.

[0004]

In such a system as described above, for example, encrypted communication information is illegally acquired by a third party, and one or two kinds of codes that are usually used repeatedly are deciphered. If it happens, there is a risk of unauthorized use.

The present invention has been made in view of the above-mentioned circumstances, and an IC card with a CPU stores a plurality of different encryption programs, and is one of many combinations of different encryption programs. In the IC card with CPU in which the three combinations are stored, the communication information is communicated with the management center through the reading device with the encryption program selected by the selection program. In addition, the communication is performed with the encryption program selected by the selection program from among a plurality of transmission units. Therefore, it is an object of the present invention to provide a communication system of an IC card with a CPU, an IC card with a CPU, a management center, and a reading device that can prevent illegal use by being illegally acquired by a third party and decrypted by a cipher. .

[0006]

In order to achieve the above object, a communication system of an IC card with a CPU according to a first aspect of the present invention provides value information and a plurality of encryption programs used when communicating. , A selection program, a plurality of decryption programs, and a value information storage area
With a CPU provided with an IC card with U, a management center that is connected to a reading device in a store by communication, and the reading device that connects and communicates the IC card with a CPU and the management center according to the purpose of use In the IC card communication system, the IC card with CPU has a plurality of encryption programs used when transmitting the value information given from the management center and the value information to the management center through the reading device, A program for selecting which encryption program should be used to transmit to the management center for each transmission unit among the plurality of encryption programs, and receiving the value information from the management center through the reading device. In addition, the received encrypted value information is decrypted in association with the plurality of encryption programs. Means for storing the number of the decoding program, and value information storage area for storing the value information, and
A plurality of stored encryption programs, selection programs, and a plurality of decryption programs, and means for transmitting / receiving the value information to / from the management center through the reading device, wherein the management center includes a plurality of types of encryption programs; A plurality of types of decryption programs for decrypting corresponding to the various types of encryption programs, a selection program for selecting which encryption program should be used for transmission, and a value information storage area for storing the value information. Storing means, the value information in the IC card with the CPU, a plurality of encryption programs used when communicating the value information through the reading device, and a plurality of encryption programs for each transmission unit , A selection program of which encryption program should be used to send to the management center, and When the through the reading device C
When the value information is received by the PU-equipped IC card, one of the plurality of encryption programs is used for each transmission unit, and the corresponding one of the encryption programs is received corresponding to the transmission. Regarding a means for giving a decryption program to be decrypted and a plurality of encryption programs and a plurality of decryption programs to the IC card with the CPU, among the various types of encryption programs and the various types of decryption programs described above, For each IC card with a CPU, a means for providing a plurality of types of encryption programs and a corresponding number of different types of decryption programs having different combinations as much as possible, a means for providing a value information storage area for storing the value information, and the reading device. Through the IC card with CPU, new value information corresponding to the value information is added to the IC card with CPU.
Means for encrypting and transmitting with the encryption program selected by the selection program for each transmission unit among the plurality of encryption programs stored in the card, and the encrypted value of the IC card with CPU through the reading device. Receives information, decrypts it with a decryption program that corresponds to the encryption program, and when necessary, encrypts new value information corresponding to the value information with the encryption program and sends it to the IC card with CPU for updating. The reading apparatus is stored in the IC card with a CPU that receives the IC card with a CPU from outside and communicates with the management center. A transmission means for reading the value information and transmitting it to the management center, and a management means corresponding to the transmission means for transmitting the value information. Receiving said value information originating from the coater, and a receiving means for communicating to the IC card with the CPU accepted by the accepting means.

With such a configuration, one transmission or reception is performed for each transmission unit when transmitting and receiving the value information through communication through the management center, the IC card with CPU, and the reading device. Therefore, each transmission unit is encrypted by a different encryption program and transmitted / received, so that the confidentiality is prevented from being damaged even if the information is illegally obtained by a third party.

Furthermore, from the management center or the CP
When transmitting value information by communication from the IC card with U through the reading device, it is necessary to select which encryption program to use for each transmission unit from a plurality of encryption programs with a selection program. Yes, a random number is used for each transmission unit and is selected in the order of the encryption program registered in the random number.

The means for making one transmission or reception for each transmission unit at the time of transmitting and receiving the value information may be a means for making a plurality of transmission units or for every fixed period.

The IC card with a CPU according to the second aspect of the present invention is the value information, a plurality of encryption programs used for communication, a selection program, a plurality of decryption programs, and a value information storage. Area and CP that stores
With a CPU provided with an IC card with U, a management center that is connected to a reading device in a store by communication, and the reading device that connects and communicates the IC card with a CPU and the management center according to the purpose of use The IC card with CPU in an IC card communication system, the value information given by the management center, and a plurality of encryption programs used when transmitting the value information to the management center through the reading device. A program for selecting which encryption program should be used to transmit to the management center for each transmission unit among the plurality of encryption programs, and receiving the value information from the management center through the reading device. In this case, the received encrypted value information is decrypted by being associated with the plurality of encryption programs. A plurality of decoding program and a plurality of encrypted programs stored and value information storage area for storing the value information, and means for storing, selection program that,
Means for transmitting and receiving the value information to and from the management center through the reading device by a plurality of decryption programs.

The management center according to the third aspect of the present invention stores the value information, a plurality of encryption programs used for communication, a selection program, a plurality of decryption programs, and the value information. Value information storage area
An IC card with a CPU for storing the information, a management center connected to a reading device in the store by communication, and the CP
I with CPU having an IC card with U and the reading device for connecting and communicating with a management center according to the purpose of use
The management center in the C-card communication system, wherein various types of encryption programs, various types of decryption programs for decrypting corresponding to the various types of encryption programs, and which encryption programs are used for transmission Means for storing a selection program as to whether or not to do and a value information storage area for storing the value information, and the CPU-equipped I
A plurality of encryption programs used when communicating the value information to the C card through the reading device, and which encryption program is used for each transmission unit among the plurality of encryption programs. And a means for providing a value information storage area for storing the value information, and a program for selecting whether to transmit the value information to the management center, and when receiving the value information in the IC card with CPU through the reading device, Means for adding a decryption program for receiving and decrypting in response to transmission by using one of the encryption programs for each transmission unit among the plurality of encryption programs, and with the CPU To add a plurality of encryption programs and a plurality of decryption programs to the IC card, the various types of encryption programs and the various types of decryption programs are given. Of the gram, with the CPU I
A means for giving several kinds of encryption programs and different kinds of corresponding decryption programs in different combinations to each C card as much as possible, and the CPU-equipped I through the reading device.
In the C card, new value information corresponding to the value information is encrypted by the encryption program selected by the selection program in each of the plurality of encryption programs stored in the IC card with the CPU, and is transmitted. Receiving the encrypted value information of the IC card with CPU through the reading means and the reading device, decrypting it with a decryption program associated with the encryption program, and adding new value information corresponding to the value information when necessary. Is encrypted by an encryption program, transmitted to the IC card with CPU, and updated.

According to this structure, among the various types stored in the management center, there is a relationship corresponding to each of the plurality of encryption programs and each of the plurality of decryption programs stored in the CPU-equipped IC card. Further, there is a relationship corresponding to each of the plurality of encryption programs stored in the IC card with CPU and each of the plurality of decryption programs of the various types stored in the management center. In addition, as an example of the encryption program used in many types, an encryption means for performing a logical operation such as logical inversion and bit rotation on digital information of information to be transmitted, and a combination of the above-mentioned encryption methods are performed. , A means for encrypting by using the DES encryption method, a means for encrypting the order of information with respect to a block of digital information of information to be transmitted, and an encryption method by an exponential calculation method using repeated square product of information to be transmitted To encrypt using a prime number theory encryption method, to encrypt by a cryptographic method using the decryption problem of a linear code, to encrypt by a quantum cryptographic method, and to algebraic curve theory. Cryptographic cryptography that transforms digital information using a cryptographic method that utilizes the discrete logarithm problem on an elliptic curve based on the basis, a special function or a correspondence table And means for, these are only one example.

A reading device according to a fourth aspect of the present invention includes value information, a plurality of encryption programs used for communication, a selection program, a plurality of decryption programs, and a value information storage area. , An IC card with a CPU that stores, a management center that is connected to a reading device in a store by communication, and the reading device that connects and communicates the IC card with a CPU and the management center according to the purpose of use, A reading device in a communication system of an IC card with a CPU, comprising: receiving means for receiving the IC card with a CPU from the outside to communicate with the management center; and the IC card with a CPU received by the receiving means. A transmitting means for reading the stored value information and transmitting the value information to the management center; Receiving said value information originating from said management center, said CPU accepted by the accepting means
Receiving means for communicating with the attached IC card.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION A communication system for an IC card with a CPU according to an embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the communication system of the IC card with a CPU includes an IC card 1 with a CPU.
01, a management center 201, and a reading device 301. The management center 201 is installed in the headquarters, and the reading device 301 is installed in each store.

As shown in FIG. 2, the IC card with CPU 101 used in the communication system of the IC card with CPU includes a CPU 102, an encryption program 103, a decryption program 104, a value information storage area 105, and a selection program 106. Of these, encryption program 1
Reference numeral 03 stores a plurality of encryption programs selected from a large number of encryption programs of the management center 201 used for encryption when transmitting the value information and the like from the IC card 101 with CPU. The decryption program 104 stores a plurality of decryption programs 104 each selected from a large number of decryption programs of the management center 201 used to decrypt the encrypted value information and the like sent from the management center 201. .
The value information storage area 105 is the management center 201 and the CPU.
The selection program 106 stores the value information for recognition between the IC cards 101 with CPU or between the IC card 101 with CPU and the owner of this card and the value information such as the usage state of the IC card with CPU 101. The encryption program in the encryption program 103 that stores the encryption program is selected.

As shown in FIG. 3, the management center 201 has a CPU 202, an encryption program 203, a decryption program 204, a value information storage area 205, and a selection program 2.
06. The encryption program 203 stores a large number of encryption programs. The decryption program 204 stores a decryption program corresponding to the encryption program, and the value information storage area 205 individually stores the value information written in the individual IC card 101 with CPU and the IC card with CPU. Stores value information such as the usage status and communication records. The selection program 206 selects which encryption program corresponding to the IC card with the CPU in communication in the encryption program 203 that stores various types of encryption programs is used.

The reading device 301 includes the IC card 101 with a CPU inserted in the reading device 301 and the management center 20.
Reading and writing of value information and the like are performed with respect to 1 at any time. The management center 201 and the reading device 301 are connected by a communication line 303.

Correspondence between the encryption and decryption methods of the management center 201 and the IC card 101 with CPU will be described with reference to FIG. The decryption program 104 of the CPU-equipped IC card, which corresponds to the one-to-one correspondence selected from a large number of the encryption programs stored in the encryption program 203 of the management center 201, is the CPU-equipped IC card 101.
It is stored in. These encryption programs 204 are randomly selected and used by the selection program 206 for each communication unit. Further, the encryption program 103 is randomly selected and used by the selection program 106 for each communication unit. The encrypted information of each of the management center 201 and the IC card with CPU 101 is decrypted by the decryption programs 104 and 204 of each. At this time, which encryption program 10 in the encryption program 103,
.. and the encryption programs 1, 2, 3, 4, ... Within the encryption program 203 are used to notify the recipients of communication via communication lines 401 and 402, respectively. The encryption program 203 and C of the management center 201
Encryption program 10 of IC IC card 101 with PU
The number of 3's and individual encryption methods may not be the same. However, it is necessary to support only the decryption method for each encryption.

An IC card 101 with a CPU in an IC card communication system with a CPU is used as a reading device 30 in a store.
The operation of inserting the data into the No. 1 and transmitting / receiving with the management center 201 will be described with reference to the flowchart of FIG. First,
The IC card 101 with CPU is inserted into the reading device 301 (step S101). IC card with CPU 101
Sends the card recognition basic information to the designated management center 201 (step S102).
The basic recognition information transmitted from the attached IC card 101 is received (step S103), and the management center 201 sends the CP.
The recognized card with CPU 101 that stores the result of recognizing the IC card 101 with U in the management center 201
Multiple dedicated encryption methods (encryption programs 10, 1
, Any of 1, 12, 13, ...) Is selected by the selection program 106 and encrypted by the designated encryption method. The management center 201 notifies the IC card with CPU 101 together with the encrypted recognition result of the IC card with CPU 101 and the information specifying the encryption method (any one of the encryption programs 1, 2, 3 ...). (Step S104). The IC card 101 with the CPU sends the recognition result sent from the management center 201 and the information designating the encryption method (any one of the encryption programs 1, 2, 3 ...).
Receive and encrypt method (encryption programs 1, 2, 3
(Any one of ...) Is used to decrypt the designated encryption program stored in the IC card 101 with CPU (decryption programs 1, 2, 3 ...
Decoding the recognition result by (any of) (step S10)
5). If the recognition result transmitted from the management center 201 is correct, the IC card with CPU 101 is the management center 2
A request for transmitting the value information for the authenticity of the IC card with CPU 101 is sent to 01 to the management center 201 (step S106). Upon receiving the value information transmission request from the IC card 101 with CPU, the management center 201 selects one from the plurality of recognized card-dedicated encryption programs 203 which stores the value information in the management center 201 by the selection program 206. However, the specified encryption method (any one of the encryption programs 1, 2, 3 ...) Is used for encryption. The management center 201, together with the encrypted value information and the information designating the encryption method (any of the encryption programs 1, 2, 3 ...), the IC card 1 with CPU
01 is notified (step S107). Management center 2
The value information sent from 01 and the information designating the encryption method (any one of the encryption programs 1, 2, 3 ...) Is CP.
The U-equipped IC card 101 receives the decryption method (decryption programs 1, 2, 3 ...) for the designated encryption stored in the CPU-equipped IC card 101 based on the information designating the encryption method. The value information is decrypted by either (step S108), and the IC card with CPU 101 compares the value information sent from the management center 201 with the value information in the IC card with CPU 101 (step S1).
09), and the encryption method (encryption programs 10, 11, 1) that stores the result in the IC card 101 with CPU.
, 13) are selected by the selection program 106 and the result is encrypted by the encryption method determined. C
The PU-equipped IC card 101 compares the encrypted value information and the encryption method (encryption programs 10, 11, 1
2, 13 ... or the like) is notified to the management center 201 together with the information (step S110). CP
The comparison result sent from the U-equipped IC card 101 and the encryption method (encryption programs 10, 11, 12, 13, ...
The management center 201 receives the information designating any one of the above), and the encryption method (encryption program 10, 11, 1)
2, 13 ... or the like) based on the information designating the specified encryption stored in the management center 201 (any of the decryption programs 1, 2, 3 ...) Then, the comparison result is decoded (step S111). The management center 201 is the CPU if the comparison result is correct.
A permission signal is transmitted to the attached IC card 101 (step S112). When the IC card with CPU 101 receives the permission signal from the management center 201, the IC card with CPU 1
01 Request the user to input value information (step S1)
13). When the user of the IC card 101 with CPU inserts the value information into the reading device 301, the information is added to the I with CPU.
IC card 101 with CPU received by C card 101
It is compared with the value information in (step S114). If the result is correct, necessary processing is performed (step S11).
5), the IC card 101 with CPU stores the necessary processing content (step S116), determines the encryption method (any of the encryption programs 10, 11, 12, 13 ...) And encrypts it. . The IC card with CPU 101 has an encrypted processing content and an encryption method (encryption program 1
It is notified to the management center 201 together with the information designating 0, 11, 12, 13, ... (Step S11).
7), processing contents sent from the IC card 101 with CPU and encryption method (encryption programs 10, 11, 12,
Information for specifying any one of 13 ...) is input to the management center 2
01 is received and the encryption method (encryption program 10,
(Any one of 11, 12, 13, ...) Is used to decrypt the designated encryption stored in the management center 201 (decryption programs 10, 11, 1).
(Any one of 2, 13, ...) Decrypts the processing content (step S118). The management center 201 confirms and judges the received processing contents, and the result is the IC card with CPU 1
01 is notified (step S119), and the IC card with CPU 101 performs termination processing according to the notified result (step S120).

The procedure for creating the IC card 101 with CPU will be described with reference to the flowchart of FIG. Value information for card recognition is input from the user of the IC card with CPU 101 (step S201), and the input value information is input to the IC card with CPU 101 and the management center 201.
To the management center 201 (step S202).
A plurality of encryption programs and a plurality of decryption programs corresponding thereto used when communicating between the IC card 101 with CPU and the plurality of decryption programs corresponding thereto (step S203). The determined plurality of encryption programs, decryption programs, and selection programs are managed by the management center 201 and IC card with CPU 101
(Step S204), and the IC card 101 with CPU is issued (step S205).

[Effects of the Invention] With the spread of the Internet, the need to protect the security of communications is becoming more and more important.
Even if a communication is intercepted by the present invention, it is almost impossible to decipher the content of the communication and the security of the communication is completely protected.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a configuration of a communication system of an IC card with a CPU according to an embodiment of the present invention.

FIG. 2 is a conceptual diagram of an IC card with a CPU.

FIG. 3 is a conceptual diagram of a management center.

FIG. 4 is a conceptual diagram showing a configuration in which an IC card with a CPU is attached to a reading device.

FIG. 5 is a conceptual diagram showing the correspondence between the encryption and decryption methods of the management center and the IC card with CPU.

FIG. 6 is a flowchart of communication processing of an IC card with a CPU.

FIG. 7 is a processing flowchart when an IC card with a CPU is issued.

[Explanation of symbols]

101 IC card with CPU 102 CPU 103 encryption program 104 Decryption program 105 Value information storage area 106 Selection Program 201 Management Center 202 CPU 203 encryption program 204 decryption program 205 Value information storage area 206 selection program 301 Reading device 302 Communication interface 303, 304 communication line 401, 402 communication line

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] March 6, 2003 (2003.3.6)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction content]

[0006]

In order to achieve the above object, a communication system of an IC card with a CPU according to a first aspect of the present invention provides value information and a plurality of encryption programs used when communicating. , A selection program, a plurality of decryption programs, and a value information storage area
With a CPU provided with an IC card with U, a management center that is connected to a reading device in a store by communication, and the reading device that connects and communicates the IC card with a CPU and the management center according to the purpose of use In the IC card communication system, the IC card with CPU has a plurality of encryption programs used when transmitting the value information given from the management center and the value information to the management center through the reading device, A program for selecting which encryption program should be used to transmit to the management center for each transmission unit among the plurality of encryption programs, and receiving the value information from the management center through the reading device. In addition, the received encrypted value information is decrypted in association with the plurality of encryption programs. To the number of decryption program, means for storing, and the value information storage area, a plurality of encrypted program stored, selection program, and the management center through the reading device by a plurality of decoding program transmission and reception of said value information The management center may be provided with a plurality of types of encryption programs, a plurality of types of decryption programs for decrypting corresponding to the various types of encryption programs, and which encryption program may be used for transmission. and Kano selection program, means for storing, and the value information storage area, and the value information on the IC card with the CPU, a plurality of encryption program for use in communicating the value information through the reading device , Which encryption program is used for each transmission unit among the plurality of encryption programs to the management center And a means for giving a selection program for whether or not to trust, and when the value information is received by the IC card with CPU through the reading device, one of the plurality of encryption programs is transmitted for each transmission unit. Means for providing a decryption program for receiving and decrypting corresponding to a transmission using an encryption program, and for providing a plurality of encryption programs and a plurality of decryption programs to the aforementioned IC card with CPU Of the various types of encryption programs and the various types of decryption programs, for each IC card with CPU,
A means for providing several kinds of encryption programs and combinations of several kinds of decryption programs which are different in combination as much as possible,
Said means for imparting valuable information storage area, the IC card with the CPU through the reading device, among the plurality of encryption programs the new value information corresponding to the value information the CPU with IC card stores, Means for encrypting and transmitting by the encryption program selected by the selection program for each transmission unit; and the CP through the reading device.
Receive the encrypted value information of the IC card with U,
An updating unit that corresponds to the encryption program and decrypts it with a decryption program, and when necessary, encrypts new value information corresponding to the value information with the encryption program, transmits it to the IC card with CPU, and updates it. The reading device includes a reception unit that receives the IC card with the CPU from the outside and communicates with the management center, and reads the value information stored in the IC card with the CPU received by the reception unit. A transmitting means for transmitting to the management center, and corresponding to the transmitting means,
Receive the value information transmitted from the management center,
Receiving means for communicating with the IC card with CPU accepted by the accepting means.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

According to this structure, the value information is transmitted or received once when the value information is transmitted and received through the management center, the IC card with CPU, and the reading device.
The communication is encrypted by a different encryption program for each transmission unit and is transmitted / received, so that confidentiality is prevented from being compromised even if information is illegally obtained by a third party.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction content]

Furthermore, from the management center or the CP
When transmitting value information by communication from the IC card with U through the reading device, it is necessary to select which encryption program to use for each transmission unit from a plurality of encryption programs with a selection program. Yes, a random number is used for each transmission unit and is selected in the order of the encryption program registered in the random number. However, selection other than random numbers
A method may be adopted.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

The IC card with a CPU according to the second aspect of the present invention is the value information, a plurality of encryption programs used for communication, a selection program, a plurality of decryption programs, and a value information storage. Area and CP that stores
With a CPU provided with an IC card with U, a management center that is connected to a reading device in a store by communication, and the reading device that connects and communicates the IC card with a CPU and the management center according to the purpose of use The IC card with CPU in an IC card communication system, the value information given by the management center, and a plurality of encryption programs used when transmitting the value information to the management center through the reading device. A program for selecting which encryption program should be used to transmit to the management center for each transmission unit among the plurality of encryption programs, and receiving the value information from the management center through the reading device. In this case, the received encrypted value information is decrypted by being associated with the plurality of encryption programs. A plurality of decoding program that, a plurality of encrypted programs stored and means for storing, and the value <br/> value information storage area, selection program, the value and the control center via the reading device by a plurality of decryption programs Means for transmitting and receiving information.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

[0011] The management center according to the third aspect of the present invention, the value information, a plurality of encryption program for use in communicating a selection program, a plurality of decryption programs, the value information storage area And an IC card with a CPU for storing, a management center that is connected to a reading device in a store by communication, and the reading device that connects the IC card with a CPU and the management center according to the purpose of use and communicates The management center in a communication system of an IC card with a CPU, comprising: a plurality of types of encryption programs; a plurality of types of decryption programs for decrypting corresponding to the various types of encryption programs; and which encryption program and good of selected program After transmitted using, and means for storing, and the value information storage area, the CPU with IC The value information, a plurality of encryption programs used when communicating the value information through the reading device, and which encryption program is used for each transmission unit among the plurality of encryption programs. the management and good or selection program Once transmitted to the center, and the value information storage area, and means for applying, when receiving the value information on the IC card with the CPU through the reading device, the plurality of encrypted Te Of the program,
Use one of the encryption programs for each transmission unit,
Regarding the means for providing a decryption program for receiving and decrypting corresponding to the transmission, and for providing the plurality of encryption programs and the plurality of decryption programs to the IC card with the CPU, the above-mentioned various types of encryption Of the program and the various types of decryption programs, means for assigning, to the IC card with the CPU, several types of encryption programs and combinations of the various types of decryption programs that differ as much as possible, and the CPU with the reading device. In the IC card, new value information corresponding to the value information is encrypted by the encryption program selected by the selection program among the plurality of encryption programs stored in the IC card with the CPU, and is transmitted. Means for receiving the encrypted value information of the IC card with CPU through the reading device. An updating unit that corresponds to the encryption program, decrypts it with a decryption program, and when necessary, encrypts new value information corresponding to the value information with the encryption program, sends it to the IC card with CPU, and updates it. , Is provided.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Urashi Nobutsu             16 at 5784, Gofuku, Toyama City, Toyama Prefecture (72) Inventor Ikuo Kubota             348-25 Kitagawa, Inami-cho, Tonami-gun, Toyama Prefecture F-term (reference) 5B035 AA13 BB09 CA11 CA38                 5B058 CA01 CA23 KA02 KA04 KA08                       KA31 KA35 YA20                 5B085 AE00 AE12 AE29 BA06                 5J104 EA22 NA35 NA40 PA07

Claims (4)

[Claims] 1. An IC card with a CPU for storing value information, a plurality of encryption programs used for communication, a selection program, a plurality of decryption programs, and a value information storage area, and an in-store store. In a communication system of an IC card with a CPU, which includes a management center connected by communication with a reading device and the reading device for connecting and communicating the IC card with CPU and the management center according to a purpose of use, the CPU The attached IC card includes a plurality of encryption programs used when transmitting the value information provided by the management center and the value information through the reading device to the management center, and transmission among the plurality of encryption programs. For each unit, a selection program for selecting which encryption program should be used for transmission to the management center, and When the value information is received from the management center through the writing device, a plurality of decryption programs for decrypting the received encrypted value information in association with the plurality of encryption programs and the value information are stored. And a means for transmitting and receiving the value information to and from the management center through the reading device by means of storing a value information storage area, a plurality of stored encryption programs, selection programs, and a plurality of decryption programs. The center consists of various types of encryption programs, various types of decryption programs that are decrypted in association with the various types of encryption programs, a selection program of which encryption programs should be used for transmission, and the value Means for storing a value information storage area for storing information;
A plurality of encryption programs used when communicating the value information to the IC card with PU and the value information through the reading device, and which encryption program for each transmission unit among the plurality of encryption programs When receiving the value information in the IC card with the CPU through the reading device and a means for providing a selection program as to whether to use and transmit to the management center and a value information storage area for storing the value information. A means for adding a decryption program for receiving and decrypting corresponding to the transmission by using one of the encryption programs for each transmission unit among the plurality of encryption programs; IC with
Regarding giving a plurality of encryption programs and a plurality of decryption programs to the card, among the various types of encryption programs and the various types of decryption programs, several types of different combinations are possible for each of the IC cards with CPU. Of the plurality of ciphers in which the IC card with CPU stores new value information corresponding to the value information in the IC card with CPU through the reading program and the means for providing the corresponding encryption program and several kinds of decryption programs. The encrypted value information of the IC card with CPU is received through the reading device and the means for encrypting and transmitting with the encryption program selected by the selection program for each transmission unit of the encryption program, A new decryption program will be added to support the value information when necessary. Updating means for encrypting the value information with an encryption program and transmitting it to the IC card with CPU for updating, the reading device accepting the IC card with CPU from outside and communicating with the management center. And the IC with the CPU accepted by the acceptance means
The value information stored in the card is read out, and the value information sent from the management center is received in response to the sending means sending the value information to the management center and the sending means sending the value information to the management center. Said CPU
A communication means for an IC card with a CPU, comprising: a receiving unit for communicating with the IC card with a CPU. 2. An IC card with a CPU for storing the value information, a plurality of encryption programs used for communication, a selection program, a plurality of decryption programs, and a value information storage area, and an in-store store. The CPU in the communication system of the IC card with the CPU, which includes a management center connected to the reading device by communication, and the reading device that connects and communicates the IC card with the CPU and the management center according to the purpose of use An IC card, which includes: a plurality of encryption programs used when transmitting the value information given by the management center and the value information through the reading device to the management center; , A selection program of which encryption program should be used to transmit to the management center for each transmission unit When receiving the value information from the management center through the reading device, store a plurality of decryption programs for decrypting the received encrypted value information in association with the plurality of encryption programs And a means for transmitting and receiving the value information to and from the management center through the reading device by means of a plurality of encryption programs, a selection program, and a plurality of decryption programs that store the value information storage area. Characteristic IC card with CPU. 3. An IC card with a CPU for storing value information, a plurality of encryption programs used for communication, a selection program, a plurality of decryption programs, and a value information storage area, and an in-store store. The management center in a communication system of an IC card with a CPU including a management center connected to the reading device by communication, and the reading device that connects and communicates the IC card with the CPU and the management center according to the purpose of use A multi-type encryption program, a multi-type decryption program that decrypts the multi-type encryption program in association with the multi-type encryption program, and a selection program of which encryption program should be used for transmission, Means for storing a value information storage area for storing value information, the value information in the IC card with CPU, and the reading A plurality of encryption programs used when communicating the value information through a storage device, and which of the plurality of encryption programs should be used for transmission to the management center for each transmission unit When the value information is received by the IC card with the CPU through the reading device and the means for giving the selection program and the value information storage area for storing the value information, the transmission unit among the plurality of encryption programs For each time, using any of the encryption programs, means for providing a decryption program for receiving and decrypting corresponding to the transmission, and a plurality of encryption programs, a plurality of encryption programs for the IC card with CPU. Regarding the addition of the decryption program, the IC card with the CPU among the various types of encryption programs and the various types of decryption programs is used. For each time, new value information corresponding to the value information is added to the CPU-equipped IC card through the reading device and means for giving a plurality of different types of encryption programs and corresponding different types of decryption programs as much as possible. The CPU through the reading device and means for encrypting and transmitting with the encryption program selected by the selection program for each transmission unit among the plurality of encryption programs stored in the attached IC card
The encrypted value information of the attached IC card is received, and it is decrypted by the decryption program corresponding to the encryption program.
A management center, comprising: a new value information corresponding to the value information, which is encrypted by an encryption program and transmitted to the IC card with the CPU and updated when necessary. 4. An IC card with a CPU for storing value information, a plurality of encryption programs used for communication, a selection program, a plurality of decryption programs, and a value information storage area, and an in-store store. The reading device in an IC card communication system with a CPU, which includes a management center connected to the reading device through communication, and the reading device that connects and communicates the IC card with CPU and the management center according to a purpose of use And the CPU-equipped I
Receiving means for receiving a C card from the outside and communicating with the management center; transmitting means for transmitting the value information stored in the IC card with CPU received by the receiving means to the management center; Receiving means for receiving the value information transmitted from the management center and communicating with the IC card with CPU accepted by the accepting means in response to the transmission by the means. .