JP3810945B2 - Data recording device for recording medium - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a data recording device for a recording medium, and more particularly, to the security of information recorded on a recording medium used for an automatic cash transaction or a cashless transaction using a card, a credit transaction using a credit card, etc. It is about improvement.
[0002]
[Prior art]
In a certain area on the cash card used in the automatic cash transaction performed using a cash card (for example, a magnetic card) or the like, unique data is recorded according to a predetermined format.
[0003]
[Problems to be solved by the invention]
Therefore, the unique data is always recorded in the same storage area (same address) on the recording area, and forgery by rewriting or copying the unique data is relatively easy. In addition, if the format is known, it is possible to rewrite specific data, so it is difficult to prevent unauthorized rewriting of the recording medium.
[0004]
The present invention has been made in view of such problems, and relates to a data recording apparatus for recording media capable of improving security.
[0005]
[Means for Solving the Problems]
(1) FIG. 1 is a principle block diagram of the present invention. In the figure, 1 is a host, 2 is connected to the host 1, and in order to restore data recorded on a recording medium or record data, the host 1 decrypts each transaction using the transaction number data as a key, or A data processing unit 3 for encryption is a recording medium, for example, a magnetic card.
[0006]
With this configuration, the data processing unit 2 encrypts data using the number of transactions managed by the host as a key. Therefore, even if data is rewritten or illegally copied, it can be made meaningless information. , Can improve security.
[0007]
(2) In claim 1, the encryption is characterized in that data is arranged in a predetermined manner using the number of transactions.
If comprised in this way, it can encrypt by carrying out predetermined arrangement | sequence of data using the frequency | count of a transaction.
[0008]
(3) In claim 1, the decoding is characterized in that data is arranged in the original order using the number of transactions.
If comprised in this way, it can decode by arranging data in the original order using the number of transactions. And this decryption is unknown to others.
[0009]
(4) In Claim 1, the recording medium 3 is an IC card, a magnetic card, an electronic notebook, a prepaid card, a CD-R, a DVD, an MD, a floppy disk, and a recording medium capable of recording data. Features.
[0010]
If comprised in this way, encryption data can be recorded on all the recording media, and the recorded encryption data can be decompress | restored.
(5) In Claim 1, the transaction number data is not received from the host but is stored in the memory in the data processing unit 2 each time.
[0011]
With this configuration, data can be encrypted and decrypted only within the data processing unit.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 2 is a block diagram showing an embodiment of the present invention. The same components as those in FIG. 1 are denoted by the same reference numerals. In the figure, 10 is a recording medium information reading / writing unit that reads information from or writes information to the recording medium 3 (not shown, see FIG. 1), and 11 is encryption / decryption using the number of transactions as a key. A main processing unit 12 is connected to the main processing unit 11, and a memory control unit 13-15 for controlling data set processing to the memory is a memory area divided into predetermined capacities.
[0013]
The main processing unit 11 controls the recording medium information reading / writing unit 10 and the memory control unit 12, and uses the communication and the number of transactions with the host 1 (not shown, see FIG. 1) for data set processing as keys. Encryption / decryption is performed, and the data set to the recording medium is controlled. The recording medium information reading / writing unit 10, the main processing unit 11, the memory control unit 12, and the memory areas 13 to 15 constitute the data processing unit 2 of FIG.
[0014]
The operation of the apparatus configured as described above will be described as follows. This will be described with reference to the flowchart of FIG. FIG. 3 shows a case where an ATM (automatic deposit / payment machine) is used as a terminal. At the start of the transaction, the card recording medium 3 is received and the data on the recording medium is read by the recording medium information reading / writing unit 10.
[0015]
The read data is temporarily saved in one of the memory areas 13 to 15 by the main control unit 11 and the memory control unit 12 (S1). At this time, the data transferred to the memory area, for example, 13 is data before decoding. Next, the main processing unit 11 requests the host to notify the host of the decryption key (number of transactions) managed by the host (S2).
[0016]
The host normally manages the number of transactions for each card. When the transaction number notification request is received from the ATM main processing unit 11, the transaction number is notified to the main processing unit 11 (S3). Next, the main processing unit 11 decrypts the card data temporarily saved in the memory area 13 using the number of transactions notified from the host as a key, and saves it in the memory area 14 (S4).
[0017]
Here, the data in the memory area 14 is data according to a predetermined format. Thereafter, various transactions are performed based on the data restored between the ATM and the host (S5). Next, the main processing unit 11 encrypts the data in the memory area 14 with a key that uses the number of transactions notified from the host (for example, a key that is different from the number of transactions + 1 when decrypted) and saves it in the memory area 15. (S6).
[0018]
Here, the card data is different from the received data. Next, the main processing unit 11 records the encrypted data in the memory area 15 on the card recording medium, and returns the card (S7).
[0019]
As described above, according to the present invention, the data processing unit 2 encrypts data using the number of transactions managed by the host as a key, so that it is meaningless information even if data is rewritten or illegally copied. Security can be improved.
[0020]
FIG. 4 is a diagram showing a specific operation sequence of the present invention. First, 1 indicates the data recording status (encrypted) on the recording medium when the card is received. Thus, the data is divided into fine units, and the encrypted data is configured by combining the fine units at random. This encrypted data is temporarily saved in the memory area 13 (2). Next, the main processing unit 11 decrypts the transaction count notified from the host as a key. As a result, the decrypted data is as shown in 3 and has a regular format in which data 1 to data 10 are arranged in order. Thus, according to the present invention, data can be decrypted by arranging the data in the original order using the number of transactions. Based on this data, various transactions are performed between the ATM and the host.
[0021]
When the transaction ends, the main processing unit 11 performs encryption using (number of transactions + 1) using the number of transactions notified from the host as a key. As a result, newly encrypted data as shown in 4 is generated. As described above, according to the present invention, data can be encrypted by performing predetermined arrangement of data using the number of transactions.
[0022]
This encrypted data is once set in another memory area. The main processing unit 11 reads the new encrypted data set in the memory area from the memory area and records the data on the recording medium. The data at this time is already encrypted.
[0023]
In the above-described embodiment, the case where the data once saved in the memory area is read and the encrypted data is recorded on the recording medium has been described, but the encrypted data is directly stored in the recording medium as indicated by 5 '. It can also be recorded.
[0024]
As the recording medium 3 described above, an IC card, magnetic card, electronic notebook, prepaid card, CD-R, DVD, MD, floppy disk, and any recording medium capable of recording data can be used. As a result, the encrypted data can be recorded on any recording medium, and the recorded encrypted data can be restored.
[0025]
In the above-described embodiment, the case where the number of transactions is received from the host each time has been described. However, the present invention is not limited to this. For example, an area for recording the number of transactions may be provided in any of the memory areas 13 to 15. At this time, the main processing unit 11 updates the number of transactions. According to this, data encryption and decryption can be performed only within the data processing unit.
[0026]
【The invention's effect】
As described above in detail, according to the present invention, the following effects can be obtained.
(1) According to claim 1, since the data processing unit encrypts data using the number of transactions managed by the host as a key, the information is meaningless even if data is rewritten or illegally copied. Can improve security.
[0027]
(2) According to the second aspect of the present invention, the data can be encrypted in a predetermined order using the number of transactions by arranging the data in a predetermined order using the number of transactions.
[0028]
(3) According to claim 3, the decoding can be performed by arranging the data in the original order using the number of transactions by arranging the data in the original order using the number of transactions. And this decryption is unknown to others.
[0029]
(4) According to claim 4, the recording medium is an IC card, magnetic card, electronic notebook, prepaid card, CD-R, DVD, MD, floppy disk and a recording medium capable of recording data. It is characterized by. As a result, the encrypted data can be recorded on any recording medium, and the recorded encrypted data can be restored.
[0030]
(5) According to the fifth aspect, the transaction frequency data can be stored in the memory in the data processing unit 2 each time instead of being received from the host. As a result, the data can be encrypted and decrypted only within the data processing unit.
[0031]
As described above, according to the present invention, it is possible to provide a data recording apparatus for recording media capable of improving security.
[Brief description of the drawings]
FIG. 1 is a principle block diagram of the present invention.
FIG. 2 is a block diagram showing an embodiment of the present invention.
FIG. 3 is a flowchart showing the operation of the present invention.
FIG. 4 is a diagram showing a specific operation sequence of the present invention.
[Explanation of symbols]
1 Host 2 Data processing unit 3 Recording medium

Claims (5)

A host, a data processing unit connected to the host, and a recording medium connected to the data processing unit;
The data processing unit includes a recording medium information reading / writing unit, a memory control unit that controls data set processing to the memory, and a main processing unit that performs encryption / decryption using the number of transactions as a key ,
The main processing unit uses the transaction frequency data notified from the host as a key, and for each transaction, the card data according to a predetermined format is divided into a plurality of units and combined at random, or encrypted. A data recording apparatus for recording media, wherein the card data is decrypted and set in a memory area . 2. The data recording apparatus for recording media according to claim 1, wherein the encryption uses predetermined number of transactions to arrange data. 2. The data recording apparatus for recording media according to claim 1, wherein the decryption arranges data in the original order using the number of transactions. 2. The recording medium according to claim 1, wherein the recording medium is an IC card, a magnetic card, an electronic notebook, a prepaid card, a CD-R, a DVD, an MD, a floppy disk, or a recording medium capable of recording data. Data recording device for media. 2. The data recording apparatus for recording media according to claim 1, wherein the transaction frequency data is not received from a host but is stored in a memory in a main processing unit each time.

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