JPH01116783A - Processing system - Google Patents

Abstract

PURPOSE:To retransmit normally requested response data to a first electronic device even after an abnormality is generated in retransmission request instruction data from the first electronic device and to prevent the generation of the turbulence of a sequence between the first electronic device and a second electronic device by providing more than two output buffers for outputting the data in the second electronic device. CONSTITUTION:The second electronic device is provided with more than two output buffers for outputting the data and has a means for identifying that input instruction data is specific instruction data or instruction data except it to switch the output buffer according to the identified result. For instance, at the time of informing the response data to the retransmission request instruction data, the second output buffer is used and the first buffer is used at the time of the information except it. Thereby, for instance, after the abnormality is generated in the retransmission request instruction data from the first electronic device, the second electronic device receives the normal retransmission request instruction data, thereby, the normally requested response data can be retransmitted to the first electronic device to generate no turbulence of the sequence between the first electronic device and the second electronic device.

Description

[Detailed Description of the Invention] [Object of the Invention] (Field of use in tL business) The present invention is an example of an IC card (i.e., 2
The receiving device (electronic device) decodes the function code included in the above instruction data, executes a series of processes corresponding to this, and then outputs the processing results as response data to the card reader/writer. The present invention relates to a processing method that can prompt an IC card to request retransmission of response data from a card reader/writer.

(Conventional Technique) Recently, as a new portable data storage medium, an IC card with a built-in IC chip that has non-volatile data memory and control elements such as a CPU (Central Processing Unit) has been developed. . This Yuzu IC
Cards are typically activated using a card reader writer, and command data is typically used during activation. The IC card decodes the function code in the received instruction data, executes a series of processes corresponding to the function code, and outputs the processing results to the card reader/writer as response data. That is, one response data is output for one life effort data. In this case, for example, if there is an abnormality in the communication path between the card reader/writer and the IC card, and the card reader/writer cannot correctly receive the response data from the IC card, the card reader/writer issues the IC card. A request is made to retransmit the response data. At this time, if there is an error in the retransmission request command data from the card reader @ Twitter and the IC card cannot normally receive this retransmission Yasugi command data, the IC card
The card must notify the card reader/writer of this fact as response data. However, if the IC card has a single output buffer for data output, and if the output buffer is used for this notification, even if the retransmission request command data is received normally, the output buffer will not contain the above notification data. Only the remaining data remains, and the response data that is being retransmitted by the Todori + Da Φ writer is destroyed. In this case, either the normal requested response data cannot be retransmitted to the card reader/writer, or the subsequent sequence with the card reader/writer is disrupted.

(Problems to be Solved by the Invention) As described above, the present invention has a problem in which an abnormality occurs in the retransmission request request data from the first electronic device, and the second electronic device correctly transmits the retransmission request command data. This was done to solve the problem of not being able to receive the retransmission request command data. Even after the retransmission request command data from the IGL electronic device becomes abnormal, the second electronic device can receive normal retransmission Yasugi command data. , it is an object of the present invention to provide a processing method that can retransmit legitimate requested response data to a first electronic device and that does not cause disturbance of the 7-point between the first electronic device and the second electronic device. .

[Structure of the invention]

(+Steps for Solving the Problems) In the present invention, a second electronic device receives command data inputted from a first electronic device, decodes a function code included in the command data, and reads the command data. In the processing power type in which a corresponding series of processing is executed and the processing results are outputted as response data to the first electronic device, the second electronic device is provided with at least two output buffers 1 for data output. The second buffer 1 is used except when receiving retransmission request command data, and the first buffer is used when receiving other command data.

(Function) Depending on the type of 66th order data from the first electronic device, the second
The output buffer can be switched by the electronic device itself. For example, the second output rose 77 is used for notification of response data to retransmission Yasugi command data, and the output buffer of Ml is used for other notifications. This allows, for example, the first
Even after the retransmission request command data from the second electronic device becomes abnormal, the second electronic device receives the normal retransmission request command data and sends the normal requested response data to the first electronic device.
The data can be retransmitted to the first electronic device, and no 7-tance disturbance occurs between the first electronic device and the second electronic device.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1θ shows a configuration example of a card scattering device used as a terminal device in, for example, a home banking system or a shopping system, to which the IC card according to the present invention is applied. That is, this device
The C card 1 can be connected to a control unit 3 consisting of a CPU or the like via a card reader/writer 2 as a card processing device, and a 1000-board 4, a CRT
It is constructed by connecting a disk gray device 5, a printer 6, and a floppy disk device 7.

The IC card 1 is held by the user and is used to refer to a personal identification number known only to the user when making a purchase, for example, and to store necessary data. Its functional blocks are shown in Figure 8. It is comprised of parts that execute basic functions such as a read/write section 11, a password setting/password verification section 12, and an encryption/decryption section 13, and a supervisor 14 that manages these basic functions. The read/write section 11 has a function of generating, writing, or erasing data to/from the data memory 16. The password setting/password verification s12 is a function that stores the #number set by the user and prohibits its extraction, and also verifies the password after setting the password and gives permission for subsequent processing◇ The encryption/decryption unit 13 performs encryption and encryption of encrypted data to prevent leakage and forgery of communication data when transmitting data from the control unit 3 to another terminal device via a communication line, for example. For example, DES (Data Encrypt)
This is a function that processes data according to an encryption algorithm that has sufficient cryptographic strength, such as John 8 Standard. The supervisor 14 has the function of decoding the function code input from the card reader/writer 2 or the function code to which data is added, and selecting and executing a necessary function among the basic functions.

In order to perform these # functions, the IC card l has a control element (e.g. CPU) as shown in FIG.
15. Non-volatile data memory 1 whose memory contents cannot be erased
6, program memory 17, and card reader/
Contact portion 18 for obtaining electrical contact with writer 2
The part inside the broken line (
Control cable 15, data memory 16, glogram memory 1
7) is composed of one IC chip. Here,
The control 141″
and an output rose 2120 of WJ2. The programmable memory 17 is made up of, for example, a mask ROM, and the ?? ! It stores a control program for the control cable 15 equipped with a table that implements basic functions. The data memory 16 is used to store six data and is composed of, for example, an EEPROM.

The card reader/writer 2 sends and receives function codes and data between the IC card 1 and the control unit 3.
Based on the macro regulations from Part 3 of ITIIJ, 14+146 valley operations are performed on the IC card 1, and 5 functions are also provided. Specifically, as shown in FIG. 9, a transport mechanism 21 that transports an IC card l inserted into a card insertion slot (not shown) to a predetermined position, a transport mechanism 21 that transports an IC card l inserted into a card insertion slot (not shown),
Contact i18 of card 0 is connected to [contact unit 22 that is contacted for fishing, control circuit 23 consisting of a CPU that controls the entire control, command data and response data between the control circuit 23 and control glt$3. It is composed of an input/output ink circuit 24 for sending and receiving ink, a data memory 25 for storing data, and the like.

Next, the operation in such a configuration will be explained. first,
The card reader/writer 2 operates according to the flowchart shown in FIG. In other words, in the steady state, the command data from the 1tilJ output unit 3 is waited for. When the 6Iy command data is input from the control unit 3, the control circuit 23 checks whether or not the IC card 1 is currently being executed. It is output to the control section 3 and then returns to the standby position again waiting for command data. If the IC card I is not being executed, the control circuit 23 outputs IC card IK command data and
There is a rush to wait for response data for card 1. When there is response data from the IC card 1, the control circuit 23
It outputs the response data and waits for the command data again.

Note that the command data output from the card reader/writer 2 to the IC card 1 has a format as shown in FIG. As shown in tb) of the same figure, there is a form in which the serial number information and function code are prefixed with a ``denitor''.

The IC card 1 operates according to the flowchart shown in FIG. That is, during steady barking, the computer is in a state of waiting for an instruction from the card reader/e-writer 2.

When command data is input from the card reader/writer 2, the controller 41 and the reciter 15 determine whether the input command data is retransmission request command data or not. If it is not the retransmission request command data, the control element 15 determines the normality of the command data, and if it is determined to be normal, performs processing based on the input command data, and sends response data indicating the processing result. 1 output buffer 19. 1, if it is determined that there is an abnormality, response data indicating a message error is set in the first output buffer. And control lll
The receiver 15 outputs the contents of the first output buffer 19 to the card reader/2-eater 2, and returns to the command data waiting state again. The response data in this case is, for example, in the format shown in Figure 2, in which the serial number information and function code that were added to the input command data are added to the information indicating the processing M4M, and the card reader Take protective measures for the 4th generation whose communication with Writer 2 is disturbed.

If the input command data is a retransmission request command, the control element 15 selects 6? Determine the normality of the i-order data. If the message is normal, the control factor 15 sets response data indicating that the message is abnormal in the second output buffer 19,
This second output (transfers the contents of Tufa 19 to a card reader)
It is output to the writer 2 and returns to the instruction data waiting state. 1
If the message is normal, the controller 15 sets the response data stored in the first buffer in the second output buffer 20, and outputs the contents of the second output buffer 20. The data is output to the card reader/writer 2 and immediately returns as command data.

That is, there are two output parameters 2A in the IC card 1, and when it is determined that the command data is retransmission request command data, the second output rose 7120 is used, and other outputs such as processing results are output. A first output buffer 19 is used. This means that if there is only one output buffer, it will be determined that the retransmission request command data is an abnormal message, and the content will be output after storing 11frM in this output buffer. If the retransmission request command data is received normally, only the response data indicating an abnormality in the previous message is stored in the output buffer, so the contents of the retransmission data requested by the card reader/writer 2 will be destroyed. It is from. In this case, the subsequent diatance will be disturbed.

First, the specific operation of the card reader/writer 2 will be explained with reference to the flowchart shown in FIG. First, the control circuit 23 initializes the serial number information, and then enters a state of waiting for command data from the controlled product 3. At this time, when command data is input from the control section 3, the control circuit 23
It is checked whether the card 1 is being executed or not, and if it is being executed, response data indicating a multiple instruction data error is output to the controlled product 3, and the state returns to the instruction data waiting state. I
If the C card 1 is not in execution, the control circuit 23 adds sequential number information, outputs command data to the IC card 1, and waits for response data from the IC card 1. At this time, if the response data is not received before the predetermined timeout value is exceeded, the retransmission request is
Promote C card IK. At this point, the control circuit 23 makes a retransmission request a predetermined number of times by increasing the retransmission request power quanta, and when that number is reached, the response data indicating a timeout is sent to 1llj 1.
31 section 3, and returns to the command data waiting state again.

Upon receiving the response data from the IC card 1, the control circuit 23 determines whether the response data is for a retransmission request, and if it is for a retransmission request, the process moves to (2) in FIG. 5(a). If it is not a retransmission request, the control circuit 23 clears the retransmission request kakunta and determines whether the command data from the controlled product 3 is a macro command. If it is a macro condensation, the sequential number information in the response data from the IC card 1 is picked up and added to the command data trap to be sent next time. When the macro command is completed, response data is output to the control unit 3, and the command data waiting state is established.

If it is not a macro command, the response data is immediately output to the control unit 3, and the process returns to the command data waiting state.

FIG. 6 shows a specific transmission procedure between the card reader/writer 2 and the IC card 1. For example, the function code (A
) shows a specific sequence when the command data is output twice in succession. The sequential number information for the 11th g1 sent command data is "1", and the sequential number information for the response data at this time is also "1". Next, assume that the second transmission of command data is not recognized by the IC card 1. At this time, since no response data is output, the card reader/writer 2 issues a retransmission request for the third transmission. The serial number information at this time is "3". At this point, when the IC card 1 receives the retransmission request command data,
If it is determined that the message is abnormal, it is output as response data. When card reader/writer 2 receives this,
A retransmission request is made again for the fourth transmission. The serial number information at this time is "4". When the IC card 1 receives this normally, it outputs the response data for the first transmission. When the card reader/writer 2 receives this, it adds the serial number information "l" added thereto at the fifth time of transmission.

In this way, the IC card is equipped with two output buffers, and the buffers are switched so that the second output buffer is used to remove notifications of retransmission request command data abnormalities, and the first output buffer is used for other notifications. By doing this, even after an error occurs in the retransmission request command data from the card reader/writer, the IC card can receive normal retransmission request command data and send the normal requested response data to the card reader/writer. Due to retransmission, no disturbance of the 7-cans occurs between the card reader/writer and the IC card.

In addition, in the above-mentioned slack example, the first electronic device is a card reader.
Although this is an example in which the IC card 1 is used as the writer 2 and the second electronic device, for example, the first electronic device may be used as the control section 3 and the second electronic device may be used as the card reader/writer 2. In short, command data input from the first electronic device is transferred to the second electronic device.
A processing method in which the receiving electronic device decodes the function code included in the command data, executes a series of processes corresponding to the received command data, and then outputs the processing results to the first electronic device as response data. If so, it is applicable.

〔Effect of the invention〕

As detailed above, according to the present invention, even after an abnormality occurs in the retransmission request command data from the first electronic device, the second electronic device receives normal retransmission request command data, so that the second electronic device can receive normal retransmission request command data. 7 between the first electronic device and the second electronic device.
- It is possible to provide a processing method that does not cause disturbance of cans.

[Brief explanation of the drawing]

The figures are for explaining one embodiment of the present invention, and FIG. 1 is a flowchart explaining the operation of the IC card, FIG. 2 is a diagram showing the format of response data output from the IC card, and FIG. 3 is a diagram showing the format of response data output from the IC card. 4 is a flowchart explaining the operation of the card reader/writer, FIG. 4 is a diagram showing 7 formats of command data output from the card reader/writer, and FIG.
The figure is a flowchart explaining the specific operation of the card reader/writer, Figure 6 is a diagram showing the specific transmission procedure between the card reader/writer and the IC card, and Figure 7 is a flowchart explaining the specific operation of the card reader/writer. Block diagram showing the configuration, No. 8
9 is a block diagram showing the structure of the card reader/writer, and FIG. 10 is a block diagram showing the structure of the card handling device. DESCRIPTION OF SYMBOLS 1... IC card (second electronic device), 2... Card reader/writer (first electronic device), 15... Control 141 element (CPU), 16... Data memory, 17
...Program memory, 19.20...Output buffer, 23...Control circuit. Figure 8 Figure 4 (b) Figure 5 Figure 7 Figure 9

Claims (2)

[Claims] (1) Transfer command data input from the first electronic device to the second electronic device.
In the processing method, the electronic device decodes the function code included in the received command data, executes a series of processes corresponding to the received command data, and then outputs the processing result to the first electronic device as response data. The second electronic device includes at least two output buffers for data output, and includes a first means for identifying whether input command data is specific command data or other command data; 1. A processing method comprising: output buffer switching means for switching an output buffer based on the identification result. (2) The process according to claim 1, wherein the specific instruction data is instruction data that requests to output the contents of a first output buffer used by other instruction data. method. (3) The output buffer switching means has a second means for identifying the normality of the input command data, and the first identifying means and the second identifying means determine that the specific command data is normal. When the specific instruction data uses the contents of the first output buffer,
3. The processing method according to claim 1, wherein the contents of the second output buffer are output after the second output buffer is transferred to the second output buffer.