JPH05145542A - Security information transmitting system for pre-paid card - Google Patents

Abstract

PURPOSE:To improve security by ciphering security data with a random key different on each occasion and inserting the random key to the ciphered data as transmission data. CONSTITUTION:A security data processing unit generates transmission optical data Di attended with entry of security data. When a random key RKY such as a date is loaded, data D are converted into scramble data Di based on a scramble function f (D, RKY). The key RKY is added to the data Di as the transmission data and recorded on a security track of a pre-paid card. The security of a transmission data string is enhanced by the coding with the key revised on each occasion of transmission.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for transmitting security data of a prepaid card to a security information judging section.

[0002]

2. Description of the Related Art In the current prepaid card system,
In a card handling machine, magnetic information data and security data recorded on the prepaid card are read and processed, but in that case,
As for security information, it is also transmitted to a CPU or the like to ask for judgment of security.

However, in the conventional security information transmission system, since the same prepaid card always has the same transmission data pattern, there is a problem that the security information is easily leaked when the data transmission line is monitored.

[0004]

SUMMARY OF THE INVENTION According to the present invention, even if the same prepaid card is used, the transmission data on the data transmission line is encrypted differently each time, so that the prepaid card can be used for the monitor of the data transmission line. It is intended to provide a security information transmission system capable of improving security.

[0005]

According to the present invention, in an information transmission system for reading security data of a prepaid card, transmitting the security data to a security information judging section, and processing the card based on the judgment result, at the time of transmitting the security data, The security information transmission system for a prepaid card is characterized in that the data is encrypted using a different random key every time and the random key is inserted into an encrypted data string to perform the above transmission.

[0006]

According to the present invention, security data is encrypted in a prepaid card with a different random key each time, a random key is inserted into the encrypted data string, and this is used as transmission data. Therefore, the same prepaid card is used. However, the transmission data on the transmission line will be changed each time.

[0007]

Therefore, even if the transmission data on the transmission line is monitored, it becomes difficult to identify the prepaid card from the transmission data, and the security of the card is improved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a prepaid card 1 used in a security information transmission system for a prepaid card according to the present invention, in which a magnetic information track 2 is provided.
In addition to this, a security track 3 is provided separately, and a punch hole P is formed in the punching area of the security track 3 in the card handling machine described below.

FIG. 2 is an internal block diagram of a card handling machine used in the security information transmission system of the present invention.
A card transport path 6 is formed from the card insertion port 4 at the left end in the figure to the card collection box 5 at the right end. The card transport path 6 includes an upper belt conveyor composed of pulleys 7a and 7b arranged above the path and a belt 7c wound around these pulleys 7a and 7b, and pulleys 8a and 8b arranged below the path and these pulleys 8a and 8b.
It is formed by a lower belt conveyor composed of a belt 8c that is wound around, and a forward / reverse rotation motor 9 is connected to a pulley 8b on the lower side, and the rotation of the motor 9 drives the upper and lower belt conveyors, and in the driving direction The prepaid card 1 inserted accordingly moves in the transport path 6.

Further, along the above-mentioned card transport path 6,
A magnetic encode read head 10, a magnetic encode write head 11, and a card punch hole driving solenoid 12 are arranged in this order from the card insertion port 4 side to the card collection box 5, and the card insertion detection sensor 1 is installed in the card insertion port 4.
3, a write timing detection sensor 14 near the magnetic encode write head 11, and a drive timing detection sensor 15 at the position of the card punch hole drive solenoid 12.
Further, immediately before the card collection box 5 described above, a card collection detection sensor 16 is provided at the end position of the transport path 6.

Further, it has a security processing unit 17 for transmitting the security data in the prepaid card 1 to a CPU, which will be described later, and the security data is inputted to the unit 17 from the magnetic encoding read head 10 described above. There is. The security data includes card issue amount frequency data, card issuing institution code data, security code data, and the like.

FIG. 3 shows a control circuit in the security system of the present invention. The CPU 18 is connected with the above-mentioned sensors 13 to 16, the card punch hole driving solenoid 12 and the forward / reverse rotation motor 9 through an input / output circuit 19. The magnetic encode read head 10 and the magnetic encode write head 11 are connected via a magnetic encode read / write control circuit 20, and further, the security processing unit 17 described above is connected via an interface 21.

Further, in this control circuit, the CPU 1
8 is based on the signals from the above-mentioned sensors 13 to 16,
The card transport path 6 is driven and controlled in accordance with a program stored in the ROM 22, and the magnetic encode read / write control circuit 20 reads magnetic data and security data from the magnetic information track 2 and the security track 3 of the prepaid card 1. ing.

Further, the CPU 18 judges the security data transmitted from the security processing unit 17,
When the determination result is correct, new magnetic data and security data are written in the tracks 2 and 3 by the magnetic encode write head 11, and a punch hole signal is output to output the card punch hole driving solenoid 12.
Is driven to open the punch hole P in the prepaid card 1.
Then, these series of processes are recorded in the RAM 24 and sent to the host computer through the interface 24.

Here, the security processing unit 17 described above is provided with a random key (here, dated), scrambles security data based on the random key, and inserts the random key into the encrypted data string. , This signal is transmitted to the host computer.

FIG. 4 is a schematic diagram of the above data processing, and the data processing will be described with reference to the flowcharts of FIGS. 5 and 6. In the security processing unit 17 described above, the transmission source data Di
(I = 1 to n) is created, the random key RKY is loaded, and scramble data D′ i is created according to the scramble function f (D, RKY) (steps n1 to n).
3). That is, the data sequence shown in FIG.
Is converted into a scrambled data string of n signals D'i (steps n1, n2, n3). Here, Di = f (D
i, RKY).

Then, the random key RKY is inserted into the scrambled data sequence D'i. For example, if the date of this card processing is November 3, the random key RKY is inserted in the fourth position, data is transmitted through the transmission data interface 23 composed of this (n + 1) number of data strings, and the processing ends. (Steps n4 and n5).

On the other hand, on the side of the CPU 18 to which data has been transmitted, as shown in FIG.
The random key RKY is introduced from the scrambled data string using the insertion inverse function g ^-1 (D ', RKY) (steps n11, n12).

Next, the inverse scramble function f ^-1 (D ', R
The original data Di is introduced from KY), and the security data is processed based on this original data (step n13,
n14).

As described above, since the date is used as the random key RKY and the insertion position of the random key in the security data string is determined from the number of the date, the control circuit shown in FIG. 3 can read the date. Clock mechanisms 25 and 26 are provided in the CPU 18 and the security processing unit 17.

Further, the entire system operation including the security information transmission system having such a configuration will be described with reference to the flowcharts of FIGS. 7A and 7B.

When the insertion of the prepaid card 1 is detected by the card insertion detection sensor 13, the CPU 18 drives the forward / reverse rotation motor 9 to insert the prepaid card 1 into the card conveying path 6.
(Steps n21 and n22).

The magnetic encode read head 10 reads the magnetic encode data and security data and the position of the security punch hole on the prepaid card 1, and the security processing unit 17 converts the security data into scrambled data described with reference to FIG. After the random key is inserted, it is sent to the CPU 18 (steps n23, n2).
4, n25).

Next, the CPU 18 determines whether the security data and the punch hole data are obtained from the transmission data,
When the determination result is OK, the card information is exchanged with the host computer and the subtraction processing of the amount of money of the prepaid card 1 is performed (steps n26, n27, n2).
8, n29).

Then, when the prepaid card 1 reaches the position detected by the solenoid drive timing sensor 15, the forward / reverse rotation motor 9 is controlled so that the prepaid card 1 is in a fixed position with respect to the card punch hole drive solenoid 12. The prepaid card 1 is transported, and then the prepaid card 1 is perforated by the solenoid 12 (step n3).
0, n31, n32).

Next, the forward / reverse rotation motor 9 is rotated in the reverse direction, and while the magnetic card 1 is conveyed to the card slot 4 side, a new magnetic field is generated by the magnetic encode write head 11 based on the card detection signal of the card magnetic write timing sensor 14. The encoded data is written in the magnetic information track 2, the new security data is written in the security track 3, and the magnetic encoded read head 10 reads the written magnetic encoded data and the punched hole position (steps n33, n34). , N35).

Then, the read punch hole position and the magnetic encode data are judged, and when the judgment result is OK, the prepaid card 1 is sent out to the position detected by the card insertion detection sensor 13, the motor 9 is stopped, and the processing is executed. Ends (steps n36, n37, n38, n3)
9).

On the other hand, the steps n27, n28,
When the NG signal for each judgment process is output at n36 and n37,
After sending the abnormality of the card data to the host computer in a state where the feeding of the prepaid card 1 is stopped, the motor 9 is driven to feed the prepaid card 1 into the card collection box 5, and the feeding is detected by the card collection detection sensor. The motor 9 is stopped by the detection by 16 and the process is terminated (steps n40, n41, n42, n43, n1.
9).

As described above, the security data of the prepaid card 1 is encrypted in the security processing unit 17 and transmitted, and the encrypted data is made different by the random key even if the same card is used. The security of data transmission is improved.

In the above embodiment, the date is used as the random key, but the present invention is not limited to this.

[Brief description of drawings]

FIG. 1 is a plan view of a prepaid card used in a security information transmission system for a prepaid card according to the present invention.

FIG. 2 is a block diagram of a card handling machine using the security information transmission system of the present invention.

FIG. 3 is a control circuit diagram in the security information transmission system of the present invention.

FIG. 4 is a schematic diagram illustrating a processing operation of the security information transmission system of the present invention.

FIG. 5 is a flowchart of processing operation on the transmission side in the security information transmission system.

FIG. 6 is a flowchart of processing operations on the receiving side in the security information transmission system.

FIG. 7A is a flowchart diagram of the entire card processing operation including the security information transmission system of the present invention.

FIG. 7B is a flowchart diagram of the entire card processing operation including the security information transmission system of the present invention.

[Explanation of symbols]

 1 ... Prepaid Card 2 ... Magnetic Information Track 3 ... Security Track 10 ... Magnetic Encoding Read Head 17 ... Security Processing Unit 25, 26 ... Clock Mechanism

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[Procedure amendment]

[Submission date] May 20, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

Title of card security information transmission system

[Claims]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for transmitting security data of a card to a security information judging section.

[0002]

2. Description of the Related Art In the current card system, a card handling machine reads information data and security data recorded on the card to process the card. Is transmitted to a CPU or the like to ask for security judgment.

However, in the conventional security information transmission system, since the pattern of the transmission data is always the same for the same card, there is a problem that the security information is easily leaked when the data transmission line is monitored.

[0004]

According to the present invention, even if the same card is used, the transmission data on the data transmission line is encrypted differently every time, so that the security of the card can be protected against the monitor of the data transmission line. It is an object of the present invention to provide a card security information transmission system that can improve security.

[0005]

SUMMARY OF THE INVENTION The present invention is an information transmission system for reading security data of a card, transmitting the security data to a security information judging section, and processing the card based on the judgment result, every time the security data is transmitted. The security information transmission system of the card is characterized in that the data is encrypted using different random keys and the random key is inserted into an encrypted data string to perform the above transmission.

[0006]

According to the present invention, security data is encrypted on a card with a different random key each time, the random key is inserted into the encrypted data string, and this is used as transmission data. The transmission data on the transmission line will be changed each time.

[0007]

Therefore, even if the transmission data on the transmission line is monitored, it becomes difficult to identify the card from the transmission data, and the security of the card is improved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a prepaid card 1 used in a security information transmission system for a card of the present invention. The prepaid card 1 is provided with a magnetic information track 2 and a security track 3 separately from the magnetic information track 2, and a punch hole of the security track 3. Punch holes P are formed in the opening area in the card handling machine described below.

FIG. 2 is an internal block diagram of a card handling machine used in the security information transmission system of the present invention.
A card transport path 6 is formed from the card insertion port 4 at the left end in the figure to the card collection box 5 at the right end. The card transport path 6 includes an upper belt conveyor composed of pulleys 7a and 7b arranged above the path and a belt 7c wound around these pulleys 7a and 7b, and pulleys 8a and 8b arranged below the path and these pulleys 8a and 8b.
It is formed by a lower belt conveyor composed of a belt 8c that is wound around, and a forward / reverse rotation motor 9 is connected to a lower pulley 8b, and the rotation of the motor 9 drives the upper and lower belt conveyors. The prepaid card 1 inserted accordingly moves in the transport path 6.

Further, along the above-mentioned card transport path 6,
A magnetic encode read head 10, a magnetic encode write head 11, and a card punch hole driving solenoid 12 are arranged in this order from the card insertion port 4 side to the card collection box 5, and the card insertion detection sensor 1 is installed in the card insertion port 4.
3, a write timing detection sensor 14 near the magnetic encode write head 11, and a drive timing detection sensor 15 at the position of the card punch hole drive solenoid 12.
Further, immediately before the card collection box 5 described above, a card collection detection sensor 16 is provided at the end position of the transport path 6.

Further, it has a security processing unit 17 for transmitting the security data in the prepaid card 1 to a CPU, which will be described later, and the security data is inputted to the unit 17 from the magnetic encoding read head 10 described above. There is. The security data includes card issue amount frequency data, card issuing institution code data, security code data, and the like.

FIG. 3 shows a control circuit in the security system of the present invention. The CPU 18 is connected with the above-mentioned sensors 13 to 16, the card punch hole driving solenoid 12 and the forward / reverse rotation motor 9 through an input / output circuit 19. The magnetic encode read head 10 and the magnetic encode write head 11 are connected via a magnetic encode read / write control circuit 20, and further, the security processing unit 17 described above is connected via an interface 21.

Further, in this control circuit, the CPU 1
8 is based on the signals from the above-mentioned sensors 13 to 16,
The card transport path 6 is driven and controlled in accordance with a program stored in the ROM 22, and the magnetic encode read / write control circuit 20 reads magnetic data and security data from the magnetic information track 2 and the security track 3 of the prepaid card 1. ing.

Further, the CPU 18 judges the security data transmitted from the security processing unit 17,
When the determination result is correct, new magnetic data and security data are written in the tracks 2 and 3 by the magnetic encode write head 11, and a punch hole signal is output to output the card punch hole driving solenoid 12.
Is driven to open the punch hole P in the prepaid card 1.
Then, these series of processes are recorded in the RAM 24 and sent to the host computer through the interface 24.

Here, the security processing unit 17 described above is provided with a random key (here, dated), scrambles security data based on the random key, and inserts the random key into the encrypted data string. , This signal is transmitted to the host computer.

FIG. 4 is a schematic diagram of the above data processing, and the data processing will be described with reference to the flowcharts of FIGS. 5 and 6. In the security processing unit 17 described above, the transmission source data Di
(I = 1 to n) is created, the random key RKY is loaded, and scramble data D′ i is created according to the scramble function f (D, RKY) (steps n1 to n).
3). That is, the data sequence shown in FIG.
Is converted into a scrambled data string of n signals D'i (steps n1, n2, n3). Here, Di = f (D
i, RKY).

Then, the random key RKY is inserted into the scrambled data sequence D'i. For example, if the date of this card processing is November 3, the random key RKY is inserted at the fourth position, data is transmitted through the transmission data interface 23 composed of this (n + 1) data string, and the processing ends. (Steps n4 and n5).

On the other hand, on the side of the CPU 18 to which data has been transmitted, as shown in FIG.
The random key RKY is introduced from the scrambled data string using the insertion inverse function g ^-1 (D ', RKY) (steps n11, n12).

Next, the inverse scramble function f ^-1 (D ', R
The original data Di is introduced from KY), and the security data is processed based on this original data (step n13,
n14).

As described above, since the date is used as the random key RKY and the insertion position of the random key in the security data string is determined from the number of the date, the control circuit shown in FIG. 3 can read the date. Clock mechanisms 25 and 26 are provided in the CPU 18 and the security processing unit 17.

Further, the entire system operation including the security information transmission system having such a configuration will be described with reference to the flowcharts of FIGS. 7A and 7B.

When the insertion of the prepaid card 1 is detected by the card insertion detection sensor 13, the CPU 18 drives the forward / reverse rotation motor 9 to insert the prepaid card 1 into the card conveying path 6.
(Steps n21 and n22).

The magnetic encode read head 10 reads the magnetic encode data and security data and the position of the security punch hole on the prepaid card 1, and the security processing unit 17 converts the security data into scrambled data described with reference to FIG. After the random key is inserted, it is sent to the CPU 18 (steps n23, n2).
4, n25).

Next, the CPU 18 determines whether the security data and the punch hole data are obtained from the transmission data,
When the determination result is OK, the card information is exchanged with the host computer and the subtraction processing of the amount of money of the prepaid card 1 is performed (steps n26, n27, n2).
8, n29).

Then, when the prepaid card 1 reaches the position detected by the solenoid drive timing sensor 15, the forward / reverse rotation motor 9 is controlled so that the prepaid card 1 is in a fixed position with respect to the card punch hole drive solenoid 12. The prepaid card 1 is transported, and then the prepaid card 1 is perforated by the solenoid 12 (step n3).
0, n31, n32).

Next, the forward / reverse rotation motor 9 is rotated in the reverse direction, and while the magnetic card 1 is conveyed to the card slot 4 side, a new magnetic field is generated by the magnetic encode write head 11 based on the card detection signal of the card magnetic write timing sensor 14. The encoded data is written to the magnetic information track 2, the new security data is written to the security track 3, and the magnetic encoded read head 10 reads the written magnetic encoded data and the punched hole position (steps n33, n34). , N35).

Then, the read punch hole position and the magnetic encode data are judged, and when the judgment result is OK, the prepaid card 1 is sent out to the position detected by the card insertion detection sensor 13, the motor 9 is stopped, and the processing is executed. Ends (steps n36, n37, n38, n3)
9).

On the other hand, the steps n27, n28,
When the NG signal for each judgment process is output at n36 and n37,
After sending the abnormality of the card data to the host computer in a state where the feeding of the prepaid card 1 is stopped, the motor 9 is driven to feed the prepaid card 1 into the card collection box 5, and the feeding is detected by the card collection detection sensor. The motor 9 is stopped by the detection by 16 and the process is terminated (steps n40, n41, n42, n43, n1.
9).

As described above, the security data of the prepaid card 1 is encrypted in the security processing unit 17 and transmitted, and the encrypted data is made different by the random key even if the same card is used. The security of data transmission is improved.

In the above embodiment, the date is used as the random key, but the present invention is not limited to this.

[Brief description of drawings]

FIG. 1 is a plan view of a prepaid card used in a card security information transmission system of the present invention.

FIG. 2 is a block diagram of a card handling machine using the security information transmission system of the present invention.

FIG. 3 is a control circuit diagram in the security information transmission system of the present invention.

FIG. 4 is a schematic diagram illustrating a processing operation of the security information transmission system of the present invention.

FIG. 5 is a flowchart of processing operation on the transmission side in the security information transmission system.

FIG. 6 is a flowchart of processing operations on the receiving side in the security information transmission system.

FIG. 7A is a flowchart diagram of the entire card processing operation including the security information transmission system of the present invention.

FIG. 7B is a flowchart diagram of the entire card processing operation including the security information transmission system of the present invention.

[Explanation of Codes] 1 ... Prepaid card 2 ... Magnetic information track 3 ... Security track 10 ... Magnetic encode read head 17 ... Security processing unit 25, 26 ... Clock mechanism

Claims (1)

[Claims] 1. An information transmission system for reading security data of a prepaid card, transmitting the security data to a security information judging section, and processing a card based on the judgment result, wherein a different random key is used every time the security data is transmitted. A security information transmission system for a prepaid card that encrypts data and inserts the random key into an encrypted data string to perform the above transmission.