JPH01173411A - Magnetic card with protective function - Google Patents

Abstract

PURPOSE:To prevent the manufacture of a counterfeit card by magnetic- recording magnetic data on a magnetic stripe after enciphering it, and printing the decoding information of this magnetic data at the specified position of a card by invisible printing. CONSTITUTION:The magnetic card 11 with a protective function is made in such a way that the magnetic stripe 12 on which the magnetic data is enciphered and stored is formed along the long direction of one side of the front surface of the card 11 of a flat plate shape, and a marking 13 to be the decoding information of the enciphered magnetic data is printed on its back surface by invisible thermal printing. This marking 13 is discriminated by a card reader. Thus, since the data of the magnetic card 11 is enciphered and recorded, write and read processing is performed under the enciphered highly secret protective function, and especially, since the decoding information of the enciphered data is formed by the invisible printing, the part printed by the invisible printing can not be perceived by looking with eyes, and besides, even if a means such as magnetic transfer is used, the magnetic information may be transferred but the invisibly printed part can not be transferred. Thus, the forgery of the card is prevented.

Description

Detailed Description of the Invention (a) Field of the Invention This invention is applicable to, for example, telephone cards used in public telephones, cash cards used in banks and post offices, credit cards used in credit companies, etc. This invention relates to magnetic cards with protective functions applied to various types of cards.

(b) Background of the Invention In recent years, as the use of cards has become widespread, multi-purpose transaction cards have been issued, and among them transaction data! In a magnetic card that performs magnetic recording, all transaction data is recorded on a magnetic stripe, which is read and written during data processing to perform card transactions.

However, this magnetic card lacks secrecy because magnetic transfer can be easily performed using magnetic processing equipment.
There is a drawback that magnetic cards can be easily counterfeited.

(c) Purpose of the Invention This invention provides a magnetic card with a protection function that processes data by encrypting magnetic data and decoding the encrypted record, thereby making it difficult to create counterfeit cards. The purpose is to provide.

(d) Structure of the Invention This invention provides a magnetic storage system in which magnetic data is encrypted and magnetically recorded in a magnetic stripe, and information for decoding the encrypted magnetic data is printed at a specific position on the card using invisible printing. It is characterized by being a functional magnetic card.

(e) Effect of the Invention According to this invention, when data is processed via a magnetic card, the encrypted data is Process magnetic data.

(to) Effects of the invention In this way, since the data on the magnetic card is recorded in an encrypted manner, this encrypted data is highly confidential! ! The reading and writing process is performed under the function, and in particular, the decryption information of the encrypted data is printed invisible.
This invisible printed part cannot be detected visually,
Furthermore, even if a means of magnetic transfer is used, although the magnetic information can be transferred, the invisible printed portion cannot be transferred, making counterfeiting of cards extremely difficult.

(g) Examples of the invention An embodiment of the present invention will be described in detail below based on the drawings.

The drawings show a magnetic card with protection function 11, and in FIGS. 1 and 2, this magnetic card 11 with protection function encrypts magnetic data in the longitudinal direction of the front side of the card 11, which has a flat plate shape. Magnetic stripe to remember 1
2, and markings 13 that serve as decoding information for the encrypted magnetic data are printed on the back surface by invisible thermal printing.

The presence and position of this marking 13 cannot be read by sight or touch, and can only be determined by a card reader 14, which will be described later.

As shown in FIG. 3, the above-mentioned card reader 14 has a magnetic head 16 arranged in contact with the magnetic stripe 12 on the card surface on the upper side of a card holding and conveying path 15 that conveys the card while holding the upper and lower surfaces of the card. The magnetic head 16 reads and writes the magnetically recorded information on the magnetic stripe 12 of the card 11.

Further, on the lower side of the card holding and conveying path 15, there is a first thermal bed 17 for writing markings corresponding to the marking writing position on the back side of the card, and a second thermal bed 17 for reading markings.
A thermal head 18 is provided oppositely to the card 18, and these thermal heads 17 and 18 write and read decryption information on the card 11.

Each of the heads 16 to 1t3 described above is controlled via a CPU 51 that performs encryption processing and oil body processing on transaction data.

By the way, the above-mentioned marking 13 is printed with invisible ink after being thermally written by the first thermal head 17, and this ink is read by the second reading thermal head 18 equipped with an infrared detection function. Then, the IIIE data corresponding to the magnetic data is decoded and a card transaction is performed.

As an example of this decoding information, as shown in FIG. As shown in Figure 4 (b), the regular arrangement positions of C and D are set in the magnetic area of information such as issue date and transaction data in the order of C-A-B-D. By rearranging the cards and recording them magnetically, and recording this decoding information on the back surface of the card using markings 13, counterfeiting of the card due to magnetic transfer of the magnetic stripe 12 is prevented.

For this reason, magnetic cards are read and processed under encrypted and highly confidential protection functions.

FIG. 5 shows a control circuit block diagram of the card reader, and C
The PU 51 controls each circuit device according to a program stored in the ROM 52, and the RAM 53 stores and reads data.

The card detection sensor 54 detects when the magnetic card 11 is carried in and out of the card holding and conveying path 15, and the card conveying mechanism 55 controls the conveyance of the magnetic card 11 to the data processing position.

The processing operation of the magnetic card with security function configured as described above will be explained with reference to the flowcharts shown in FIGS. 6 to 8.

Referring to FIG. 6, a case where a card transaction is carried out using this protective magnetic card 11 will be explained next.

In the first step 61, when the magnetic card 11 is now inserted into the card reader 14, in the second step 62, the card detection sensor 54 detects the insertion of this car F:, 11, and based on this, the magnetic card 11 is inserted into the card reader 14. 11 is taken inside, and the magnetic information on the magnetic stripe 12 is read by a magnetic head 16. At this point, in a third step 63, the information on the marking 13 on the back of the card is read by the second thermal head 18, and based on this marking information, in a fourth step 64, the encrypted magnetic stripe information is decoded. Then, in the fifth step 65, the decoded regular magnetic information is sent to the CPU.
51. As a result, in the sixth step 66, C
The PU 51 performs a reading process corresponding to this regular magnetic information and performs a predetermined data transaction.

In the writing process at this time, in FIG. 7, when the magnetic card 11 is inserted into the card reader 14 at step 11, at step 72, the information on the marking 13 on the back of the card is transferred to the second Based on the marking information read by the thermal head 18, data processing information to be written on the magnetic stripe 12 is transmitted to the CPU 51 in a thirteenth step 73. Based on this information, in a fourteenth step 74, the CPU 51 encrypts the information to be written, and in a fifteenth step 75, the encrypted information is written on the magnetic stripe 12, and a series of encrypted card transactions is executed. finish.

Further, in FIG. 8, the case where a new card is issued will be explained next.

In a twenty-first step 81, when the magnetic card 11 is inserted into the card reader 14, in a twenty-second step 82, new card transaction information to be read out and left on the magnetic stripe 12 of this card 11 is written to the CPtJ.
51. Based on this information, in a twenty-third step 83, the CPU 51 creates new decryption information for the new card, and in a twenty-fourth step 84, it encrypts this information, and the encrypted decryption information is In a twenty-fifth step 85, marking 13 processing as decoding information is applied to the back side of the card via the first thermal head 17. Correspondingly, in a twenty-sixth step 86, a new card is created by writing the encrypted information onto the magnetic stripe 12.

As mentioned above, since the data on the magnetic card is recorded in an encrypted form, the read/write process is performed under this highly confidential protection function, and especially the decryption information of the encrypted data. is formed by invisible marking printing, so the marked part cannot be visually detected, and even if a means of magnetic transfer is used, even if the magnetic information can be transferred, the marking will not be transferred. This makes card counterfeiting extremely difficult.

In the correspondence between this invention and the structure of the above-mentioned embodiment, the magnetic card with a self-protection function of the present invention corresponds to the magnetic card 11 of the embodiment, and similarly, the invisible printing on the card is the marking 13. However, the present invention is not limited to the configuration of the above-described embodiment.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a perspective view showing the back side of a magnetic card, FIG. 2 is a perspective view showing the front side of the magnetic card, and FIG. 3 is an explanatory diagram of a card reader. 1st (a) is an explanatory diagram showing the magnetic stripe data before encryption, Fig. 4 (b) is an explanatory diagram showing the magnetic stripe data after encryption, and Fig. 5 is a block diagram of the control circuit of the card reader. Figure 6 is flow 1 when reading a magnetic card? - Fig. 7 is a flowchart when writing to a magnetic card, and Fig. 8 is a flowchart when creating a new magnetic card. 11... Magnetic card 12... Magnetic stripe 13... Marking 16... Magnetic head 17
...First thermal head 18...Second thermal head 51...CPU first
Sekiguchi's figure 3 shows the durability of the swamp. Figure 4. Figure 6. Figure 7. No 0 Flow Handbook
Atsushi-F-Written Death-Fu-D-Miyato Figure 8

Claims (1)

[Claims] (1) A magnetic card in which magnetic data for card transactions is recorded on a magnetic stripe, wherein the magnetic data is encoded and magnetically recorded on the magnetic stripe, and decoding information of this encoded magnetic data is printed invisible. A magnetic card with a protective function printed on a specific position on the card.