JPH03149690A - Card application device - Google Patents

Abstract

PURPOSE:To prevent the generation of invalid writing or the alternation of contents by recording ciphered data in a magnetic card and recording a method for decoding the ciphered data. CONSTITUTION:When the magnetic card 10 is inserted, a card processor 1 reads out the ciphered data recorded in the card 10 and decoding data indicating the method for decoding the ciphered data and decodes the ciphered data by a decoding means 6. At the time of new updated data in the card 10, the card processor 1 encodes the updated data by an encoding means 5 based upon another ciphering sort and writes the encoded updated data and decoding data indicating the method for decoding the updated data in the card 1 by a writing means 3 to return both the data. Even if data recorded in the card 10 are inalidly read out, it is impossible for the contents to be read out until the specific card processor 1 is used.

Description

Detailed Description of the Invention (A) Industrial Application Field The present invention includes a magnetic card and a card processing machine, and when the magnetic card is inserted, the card processing machine reads the data recorded on the magnetic card. The present invention relates to a card operating device that writes updated data to the magnetic card and returns the card.

(Explanation) Conventional technology In such card operation devices, especially in systems that use magnetic cards to settle transactions, there is a risk that data representing the value of the card may be tampered with or written to illegally. There is.

Therefore, in JP-A-63-101961, value information can be written to and read from other magnetic stripes only when there is timing information written in a specific magnetic stripe, and there is no value information. A security method for a magnetic card usage system is disclosed in which timing information is erased.

(8) Problems to be Solved by the Invention However, in the above-mentioned prior art, it is the decision of the league writer used in this system to control the writing and reading of value information using timing information.
If other league writers unrelated to this system are used, fraudulent value information can be written to and read from cards.

Therefore, the present invention provides a card operation device that records data on a card so that the contents cannot be read even if an unauthorized attempt is made to read the data recorded on the card.

(2) Means for Solving the Problems In order to solve the above problems, a card operating device according to the present invention includes a magnetic card and a card processing machine, and the data is encrypted and recorded on the magnetic card. , and decode data indicating a method for decoding the encrypted data. an encoding means for encoding the updated data using a different encryption type when writing new data to the magnetic card; and decoding data for displaying the encoded updated data and a method for decoding the updated data. and writing means for writing into the magnetic card.

(*) When a magnetic card is inserted, the card processing machine reads the encrypted data recorded on the magnetic card and decode data indicating the method for decoding this encrypted data, and uses the decoding means to decode the encrypted data. When the card processing machine writes new updated data to the magnetic card, the encoder encodes the updated data with another type of encryption,
Next, the writing means writes the encoded update data and decode data indicating a method for decoding the update data onto the magnetic card and returns the card.

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

Figure 2 shows a magnetic card 10 applied to this card operation device.
This diagram schematically shows the recording format of . card 10
The magnetic recording section 11 can record 72 characters of information, each character being a unit of information, and each character is represented by an 8-pit binary code. The magnetic recording section 11 contains security information such as specific data 12 and operator code 13 for distinguishing it from other card systems, and value information 14 that is data indicating the monetary value that the card currently has. recorded. The value information 14 is recorded in an encrypted manner on the magnetic recording section 11, and decode data 15 indicating a method for decoding the encrypted value information 14 is further recorded.

There are two methods of encryption: one is to perform logical operations on value information with specific data, and the other is to load the value information and encrypt it. Therefore, the decoded data 15 in the former case is set to data such that a logical operation is performed on the encrypted value information and the result becomes the original value information. In the latter case, the decode data 15 is data that specifies a rotation method for restoring the value information encrypted by rotation.

At this time, the rotating method for decoding is set in the card processing machine, and the decode data 15 recorded on the card is one of the rotating methods for decoding set in the card processing machine. It specifies one of the following. Since the encoded data 15 is set using an 8-bit code, a maximum of 256 types of encryption can be set.

FIG. 1 shows, in block form, the configuration of a vending machine as a card processing machine 1 for processing this magnetic card 10. As shown in FIG. In the figure, reference numeral 2 denotes a magnetic head that reads/writes data into the magnetic recording section 11 by moving relative to the magnetic card 10. Writing of data is controlled by a write control means 3, and reading of data is controlled by a read control means. 4.

5 is an encoding means, which encodes the value information to be written on the magnetic card 10 with the encryption type 7a indicated by the encryption type determining means 7. At this time, the encryption type determining means 7 indicates the encryption type to the encoding means 5, and at the same time outputs to the writing control means 3 decode data 7b indicating a method for decoding the encoded value information.

Decoding means 6 decodes the encrypted value information recorded on the magnetic card 10 using decode data also recorded on the magnetic card 10.

8 is an arithmetic processing means, which performs arithmetic processing of the vending machine using data 6a shown from the decoding means 6;
The vending device 9 provides a product or a predetermined service to the person inserting the magnetic card according to the result of the arithmetic processing. After providing the product or service, the arithmetic processing means 8 outputs the updated data 8 to the encoding means 5.

To explain the operation with reference to the flowchart in FIG. 4, the card processing machine 1 first determines whether a card is inserted in step S1, and
If it has been loaded, proceed to the next 52 steps.

In step S2, the reading control means 4 reads the data recorded on the inserted magnetic card. Then, in the next step S3, the reading control means 4 determines whether the inserted magnetic card is appropriate based on the security information recorded on the inserted magnetic card.

If the inserted card is correct, the reading control means 4
In order to show the value information 14 and decoded data 15 read from this card to the decoding means 6, in step S4, the decoding means 6 decodes the value information 14 recorded on the card. Incidentally, at this time, the reading control means 4
shows fixed data such as security information recorded on the card in the write control means 3.

The read control means 4 also indicates the decoded data 15 to the encryption type determination means 7, so in step S5, the encryption type determination means 7 selects an encryption type different from the indicated encryption type. That is, the 256 types of encryption are ranked in order, and when the encryption type recorded on the card is indicated, the encryption type determining means 7 selects the encryption type with the next rank.

The decoding means 6 shows the decoded value information 6@ to the arithmetic processing means 8 as the value currently held by the inserted card. Therefore, in step 86, the arithmetic/processing means 8 arithmetic-processes the value information shown from the decoding means 6, and controls the vending machine 9 according to the result. As a result, products or services are provided according to the value currently held by the input card.

In the next step S7, the calculation processing means 8 calculates updated value information by subtracting the consideration due to the sales device 9 providing the product or service from the value of the card.

Then, in step S8, the encoding means 5 encodes the updated value information 8-a indicated by the arithmetic processing means 8 using the encryption type 73 indicated by the encryption type determining means 7. In the next step S9, the enfood data 5a shown by the enfood means 5, the decoded data 7b shown by the encryption type determining means 7, and the security information etc. shown by the reading control means 4 are processed. After the write control means 3 controls the magnetic head 2 so as to record the fixed data of the card in series in accordance with the predetermined format shown in FIG. 2, the card processing machine 1 ends its operation. According to the present invention, even if the data recorded on the card is read, it is difficult to read the data because it is encrypted, and unauthorized writing or tampering can be prevented. Since the data is encrypted with a different encryption type each time the card is used, it is almost impossible to analyze the data, thereby providing a card operation device that can effectively prevent unauthorized use of the card.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of the card processing machine, FIG. 2 is a diagram schematically showing the recording format of a card, and FIG. 3 is a flowchart explaining the operation of the card processing machine. 1...Card processing machine, 3...Writing control means,
5... Encoding means, 6... Defooding means,
10...Magnetic card.

Claims (1)

[Scope of Claims] 1. Includes a magnetic card and a card processing machine that processes the magnetic card, and when the magnetic card is inserted, the card processing machine reads the data recorded therein and then updates the data. In a card operating device configured to write data on the magnetic card and return it, the data is recorded in an encrypted manner on the magnetic card, and a method for decoding the encrypted data is also displayed. The card processing machine includes a decoding means for decoding the encrypted data based on the decoded data, and a decoding means for decoding the encrypted data based on the decoded data, and a decoding means for decoding the encrypted data based on the decoded data, and a decoding means for decoding the encrypted data based on the decoded data, and a decoding means for decoding the encrypted data based on the decoded data. Encoding means for encoding this updated data using another encryption type, and writing means for writing encoded updated data and decoded data for displaying a method for decoding this updated data onto the magnetic card. A card operation device characterized by: