JP2919507B2 - Card operation device - Google Patents

Description

The present invention includes a magnetic card and a card processor. When the magnetic card is inserted, the card processor reads data recorded on the magnetic card, The present invention relates to a card operation device that writes updated data to the magnetic card and returns the data.

(B) Conventional technology In such a card operating device, particularly in a system for settling transactions using a magnetic card, there is a risk that data representing the value possessed by the card may be tampered with or written illegally. There is.

For this reason, Japanese Patent Application Laid-Open No. 63-101961 discloses that when there is timing information written on a specific magnetic stripe, value information can be written / read on another magnetic stripe, and when there is no value information, There is disclosed a security system in a magnetic card utilizing system which erases timing information.

(C) Problems to be Solved by the Invention However, in the above-mentioned prior art, it is the decision of the reader / writer used in this system that the writing and reading of the value information is controlled by the timing information, and is independent of this system. If another reader / writer is used, illegal value information can be written to and read from the card.

Accordingly, the present invention provides a card operation device that records data on a card so that even if the data recorded on the card is illegally read, the contents cannot be read.

(D) Means for Solving the Problems In order to solve the above problems, a card operation device according to the present invention includes a magnetic card and a card processor, and the magnetic card records and encrypts the data. In addition, the card processor is configured to record decoded data indicating a method for decoding the encrypted data, and the decoding unit decodes the encrypted data based on the decoded data. Encoding means for encoding the updated data with a different encryption type when writing the new data to the magnetic card; and decoded data for displaying the encoded updated data and a method for decoding the updated data. And writing means for writing the data on the magnetic card.

(E) Function When the magnetic card is inserted, the card processor reads the encrypted data recorded on the magnetic card and the decode data indicating the method for decoding the encrypted data, and decodes the data. Decrypts the encrypted data. Then, when writing the updated new data to the magnetic card, the card processor encodes the updated data with another encryption type by the encoding unit, and then updates the updated data encoded by the writing unit with the encoded data. Write the decoded data indicating the method for decoding the update data to the magnetic card and return it.

(F) Embodiment Hereinafter, the card operation device of the present invention will be described using an example of a sales system using a card as a medium.

FIG. 2 shows a magnetic card 10 applied to this card operating device.
2 schematically shows the recording format of the above. The magnetic recording unit 11 of the card 10 can record 72 character information in which one character is unit information, and each character is represented by an 8-bit binary code. The magnetic recording unit 11 has specific data 12 and an operator code for distinguishing it from other card systems.
Security information such as 13 and value information 14 which is data indicating the monetary value of the card at the present time are recorded. The license information 14 is encrypted and recorded. The magnetic recording unit 11 further records decode data 15 indicating a method for decoding the encrypted license information 14.

As a method of encryption, there are a case where the value information is logically operated with specific data and encrypted, and a case where the value information is rotated and encrypted. Therefore, the decoded data 15 in the former case is set to data that performs a logical operation on the encrypted value information and the result becomes the original value information. Decode data 15 in the latter case
Is data designating a rotation method for restoring the value information encrypted by rotation. At this time, the rotation method for decryption is set in the card processor, and the decoded data 15
Designates one of the rotation methods for re-establishment set in the card processing machine in various ways. Since the encoded data 15 is set with an 8-bit code, up to 256 types of encryption can be set.

FIG. 1 is a block diagram showing a configuration of a vending machine as a card processing machine 1 for processing the magnetic card 10. As shown in FIG. In FIG. 1, reference numeral 2 denotes a magnetic head for reading / writing data from / to a magnetic recording unit 11 by relative movement with respect to a magnetic card 10; 4 is controlled.

Reference numeral 5 denotes an encoding unit, which encodes the value information to be written on the magnetic card 10 with an encryption type 7a indicated by the encryption type determination unit 7. At this time, the encryption type determining means 7
Indicates the type of encryption to the encoding means 5 and outputs to the writing control means 3 decoded data 7b indicating a method for decoding the encoded value information.

Reference numeral 6 denotes decoding means for decoding the encrypted value information recorded on the magnetic card 10 with the decoded data also recorded on the magnetic card 10.

Numeral 8 denotes arithmetic processing means for performing arithmetic processing of the vending machine by the data 6a indicated by the decoding means 6,
The vending device 9 provides a product or a predetermined service to a magnetic card inserter according to the result of the arithmetic processing. After the provision of the product or service, the arithmetic processing unit 8 outputs the updated data 8a to the encoding unit 5.

The operation will be described with reference to the flowchart of FIG. 4. First, the card processor 1 determines the insertion of a card in step S1,
If it has been inserted, go to the next S2 step.

In this S2 step, the data recorded on the inserted magnetic card is read by the read control means 4. Then, in the next S3 step, the reading control means 4
The suitability of the magnetic card is determined from the security information recorded on the inserted magnetic card.

If the inserted card is appropriate, the reading control unit 4 indicates the value information 14 and the decoding data 15 read from the card to the decoding unit 6, so that in step S4, the decoding unit 6 checks the value recorded on the card. The information 14 is decoded. At this time, the read control means 4 indicates fixed data such as security information recorded on the card to the write control means 3.

Further, since the reading control means 4 also shows the decoded data 15 to the encryption type determining means 7, in step S5, the encryption type determining means 7 selects an encryption type different from the indicated encryption type. That is, the order of the 256 encryption types is determined, and the encryption type determining means 7 selects the encryption type of the next order when the encryption type recorded on the card is indicated.

The decoding means 6 shows the decoded value information 6a to the arithmetic processing means 8 as the value currently held by the inserted card. Therefore, in step S6, the arithmetic processing means 8
Calculates the value information indicated by the decoding means 6 and controls the vending apparatus 9 according to the result. As a result, a product or service corresponding to the value currently held by the input card is provided.

In the next step S7, the arithmetic processing means 8 calculates the updated value information by subtracting the value of the price provided by the selling device 9 for providing the product or service from the value held by the card.

Then, in step S8, the encoding unit 5 encodes the updated value information 8a indicated by the arithmetic processing unit 8 with the encryption type 7a indicated by the encryption type determination unit 7. Then, in the next S9 step, the encoded data 5a indicated by the encoding means 5, the decoded data 7b indicated by the encryption type determining means 7, and the card such as the security information indicated by the reading control means 4 After the write control means 3 controls the magnetic head 2 so as to record the fixed data in series according to the predetermined format shown in FIG. 2, the card processor 1 ends the operation.

(G) Effects of the Invention According to the present invention, even if data recorded on a card is read, it is difficult to read because the data is encrypted, and illegal writing and tampering can be prevented. Moreover, since the data is encrypted with a different encryption type each time the card is inserted, it is almost impossible to analyze the data, and a card operation device that can effectively prevent unauthorized use of the card is provided. Is done.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of a card processor, FIG. 2 is a diagram schematically showing a recording format of a card, and FIG. 3 is a flowchart for explaining the operation of the card processor. 1 ... Card processing machine, 3 ... Write control means, 5 ...
Encoding means, 6: decoding means, 10: magnetic card.

Claims (1)

(57) [Claims] 1. A magnetic card and a card processor for processing the magnetic card, wherein the card processor reads data recorded on the magnetic card when it is inserted, and then updates the updated data. In a card operation device which is written and returned on a magnetic card, the magnetic card has the data encrypted and recorded and decode data indicating a method for decoding the encrypted data. The card processor includes: decoding means for decoding the encrypted data based on the decoded data; and updating the updated data when writing new updated data to the magnetic card. Encoding means for encoding the data with a different encryption type, and decoding the encoded update data and the update data. Card operation apparatus characterized in that a writing means for writing to the magnetic card and decoding data process for displaying the for.