JPH01116784A - 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:According to the state of the instruction data from the first electronic device, the second electronic device itself can switch the output buffer. For instance, at the time of informing the abnormality of the instruction data, the second output buffer is used and at the time of the information except it, the first output buffer is used. Thereby, for instance, even after the abnormality is generated in the retransmission request instruction data from the first electronic device, the second electronic device receives the normal retransmission 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 [Objective of the Invention] (Industrial Application Field) The present invention is directed to transmitting command data inputted from, for example, a card reader/writer (first electronic device) to an IC card (second electronic device). ) decodes the function code included in the above command 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 capable of prompting an IC card to request retransmission of response data from a card reader/writer.

(Prior Art) Recently, as a new portable data storage medium, an IC card containing a built-in IC chip having a nonvolatile data memory and a control element such as a CPU (central processing unit) has been developed.゛This kind of I
C cards are usually read using a card reader/writer.
#I, and it is common to use command data during its operation. The IC card decodes the function code of 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 outputted in response to one command 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 response data from the IC card,
The card reader/writer requests the IC card to retransmit response data. At this time, if an abnormality occurs in the retransmission request command data from the card reader/writer and the IC card cannot properly receive the retransmission request command data, the IC card will notify the card reader/writer of this as response data. must be done. However, I.C.
If the card has a single output buffer for data output, and if you use the output buffer for the notification, the retransmission request command data will be received normally, but the output para 2a trap will be for the above notification. Only the data remains, and the card reader
The response data that the writer requests for retransmission will be destroyed. In this case, not only the normally requested response data cannot be retransmitted to the card reader/writer, but also the communication with the subsequent card reader/writer is disturbed.

(Problems to be Solved by the Invention) As described above, the present invention has a problem in that when an abnormality occurs in the retransmission request command data from the first electronic device and the second electronic device cannot normally receive the retransmission request command data. This was done to solve the problem in the case of ρ. Even after the retransmission request command data from the GL electronic device becomes abnormal, the M2 electronic device can receive a normal retransmission request request data. It is an object of the present invention to provide a processing method that can retransmit normal 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. purpose.

[Structure of the invention]

(Means for Solving the Problems) The present invention provides for the gx2 electronic device to receive command data input from a first electronic device, decode the function code included in the command data, and respond to the received command data. In the processing method of executing a series of processing and then outputting the processing results as response data to the first electronic device, the second electronic device includes at least two output buffers for data output; It is characterized in that the first output buffer 2a is used when command data from the first electronic device is received normally, and the second output buffer is used when the command data is received abnormally.

(Operation) The output buffer can be switched by the second electronic device itself in response to the state trap of command data from the first electronic device. For example, the second output buffer is used for notification of command data abnormality, and the first output buffer is used for other communication. With this, for example, even after an abnormality occurs in the retransmitted Yasugi Umbrella data from the first electronic device, the second electronic device can receive the normal retransmission request command data and send the normally requested response data. The data can be retransmitted to the first electronic device, and the sequence between the first electronic device and the second electronic device will not be disrupted.

(Example) An example of the present invention will be described below with reference to the drawings.

FIG. 10 shows an example of the configuration of a card handling device used as a terminal device in a home banking system or 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 keyboard 4. It is constructed by connecting a CRT display device 5, a printer 6, and a floppy disk device 7.

The IC card 1 is used to refer to the personal identification number that Eza holds and that only Eza obtains when purchasing products, 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 unit 11 has a function of reading data from, writing to, or erasing data from the data memory 16. The password setting/password verification unit 12 has a function of storing the password set by the user and prohibiting reading of the password, as well as verifying the password after setting the password and granting 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. It is a device that performs decryption, for example, DES (Data Encrypt
This is a function that processes data using an encryption algorithm that has sufficient encryption strength, such as ion 5 standard. The supervisor 14 has the function of decoding the function code inputted from the card reader/data 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 1 is equipped with a trap and a control element (for example, a CPU) as shown in FIG.
15. Non-volatile data memory whose memory contents can be erased 1
6. Consists of a grogram sled 17 and a contact section 18 for obtaining electrical contact with the card reader/writer 2, of which the portion within the broken line (control cable 15.-data memory 16, program memory 17
) consists of one IC chip. Here, control H
The g element 15 includes at least two or more output ports 7a for data output, for example, a first output port 7a 19 and a second output buffer 20. Program memory 17
The control element 15 is composed of, for example, a mask ROM, and stores a control program for the control element 15, which includes subroutines for realizing each of the basic functions described above. Data memory 1
6 is used to store each woodcutter data, for example, EEPf (
, OM.

The card reader/writer 2 includes an IC card 1 and a control unit 3.
It exchanges function codes and data with the IC card IK based on macro commands from the control unit 3.
, it also has a function of performing l-instruction l-response operations. Specifically, as shown in FIG. 9, a transport mechanism 21 transports an IC card 1 inserted into a card insertion slot (not shown) to a predetermined position, and a contact of the IC card 1 set at a predetermined position. A contact section 22 electrically contacts the section 18, a control circuit 23 consisting of a CPU that controls the entire system, and an input/output section for exchanging command data and response data between the control circuit 23 and the control section 3. It is composed of an interface circuit 24, 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 the W2B diagram. In other words, in the steady state, it is in a state of waiting for command data from the control section 3. When command data is input from the control unit 3, the control circuit 23 checks whether the IC card 1 is being executed or not, and if the IC card 1 is being executed, controls response data indicating a multiple command data error. Output to unit 3 and return to command data waiting state. If IC card 1 is not running, control circuit 2
3 outputs IC card IK command data, and IC card 1
It enters a state of waiting for response data from. When there is response data from the IC card 1, the control circuit 23 outputs the response data to the control section 3 and returns to the command data waiting state 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. 4, for example, and as shown in FIG. Alternatively, there is a form in which data is added to the serial number information and function code, as shown in FIG.

The IC card 1 operates according to the flowchart shown in FIG. That is, in the steady state, it is in a state of waiting for command data from the card reader e-writer 2.

When command data is input from the card reader/writer 2, the control element 15 determines whether or not there is a message abnormality in the input command data. If there is no abnormality in the message, then the control element 15 determines whether or not this command data is forwarding request command data, carries out processing based on the input command data, and sends response data indicating the processing result to the first Set the output x7a19. Then, the control element 15 outputs the contents of the first output buffer 19 to the card reader/writer 2, and returns to the command data waiting state again. In the case of retransmission request command data, the contents of the first output buffer 19 are output as they are to the card reader/writer 2, and the process returns to the data waiting state. The response gater in this case has a format as shown in FIG. 2, for example, and adds the serial number information and function code added to the input command data to the information indicating the processing result, and Take protective measures in case the sequence with the writer 2 is disrupted.

If there is an abnormality in the piezoelectric message of the input command data, set response data indicating an abnormality in the message in the second output buffer 20, output the contents of this second output buffer 20 to the card reader/writer 2, The state returns to the instruction data waiting state.

In other words, there are two output sofas in the IC card 1, and a second one when it is determined that the command data is abnormal.
The first output buffer 19 is used for outputting other processing results. This means that if the output buffer is empty, for example, it will be determined that the retransmission Yasugi command data is an abnormal message, and the content will be output after storing the determination result in this output buffer. After that, if the retransmission Yasugi command data is successfully received, only the response data indicating the previous message abnormality is stored in the tag cover 7a, so the card reader/writer 2
This is because the contents of the retransmitted data will be destroyed. In this case, the subsequent steps will be disrupted.Next, 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 control section 3. At this time, when command data is input from the control section 3, the control circuit 2
3 confirms whether or not the IC card 1 is in execution, and if it is in execution, outputs response data indicating a multiple instruction data error to the control unit 3, and returns to the instruction data waiting state again. If the IC card 1 is not in execution, the control circuit 23 appends sequential number information, outputs IC card IK command data, and waits for response data from the IC card 1. At this time, if response data is not received before a predetermined time act value is exceeded, the IC card 1 is prompted to request retransmission. At this time, the power circuit 2.
3 performs retransmission a predetermined number of times by aggregating the retransmission request kakunta, and when that number is reached, response data indicating a time act is output to the control section 3, and the state 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 or not, and if it is for a retransmission Yasugi, the process moves to (2) in FIG. 5 ta). If the instruction data is not a retransmission request, the i++m circuit 23 clears the retransmission request kakunta and determines whether the instruction data from the control unit 3 is a macro instruction. If it is a macro command, the serial number information in the response data from the IC card 1 is incremented and added to the command data to be sent next time. Then, when the macro command is completed, a response gater is output to the control unit 3, and the command data is waited for again.
Return to state. 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 order of transmission between the card reader/writer 2 and the IC card 1, and shows, for example, a specific sequence in the case where the ml command data called function code is output twice. The sequential number information of the first sent command data is "1", and the sequential number information of the response data at this time is also "1". Next, it is assumed that the branch command data for the second transmission is not sent to the IC card. 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 time, when the IC card 1 receives the retransmission request command data and determines that the message is abnormal, it outputs it as response data. When the card reader/writer 2 receives this, it issues a retransmission request for the fourth transmission. The serial number information at this time is "4". When IC canid 1 receives this normally, it outputs the response data for the first transmission. When the card reader/writer 2 receives this, it counts up the serial number information "1" added thereto and adds it at the fifth time of transmission.

Konoyo 5 is equipped with two sofas with an IC card,
The second output buffer 71 is used for notification of retransmission Yasugi command data abnormality, and the first output buffer is used for other notifications.By switching the buffer from 9 to 5, the card reader Even after the retransmission request command data from the writer becomes abnormal, if the IC card receives normal retransmission request command data, the normal requested response data can be retransmitted to the card reader/writer. There is no disturbance in the sequence between the IC card and the IC card.

Note that in the above embodiment, the first electronic device is a card reader/
In this example, the IC card 1 is used as the writer 2 and the second electronic device, but 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 Φ writer 2. In short, command data input from the first electronic device is transferred to the second electronic device.
The electronic device receives the command data, decodes the function code included in the command data, executes a series of processes corresponding to this, and then outputs the processing result to the first electronic device [tK] as base answer data. It is applicable if it is a method.

〔Effect of the invention〕

As described in detail above, according to the present invention, even after the retransmission request command data from the first electronic device becomes abnormal, the second electronic device can receive normal retransmission request command data. It is possible to provide a processing method in which normal requested response data can be retransmitted to the first electronic device, and - there is no disturbance in the sequence between the first electronic device and the second electronic device.

[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. 70-chart explaining the operation of the card reader/writer, FIG. 4 is a diagram showing the format of command data output from the card reader/writer, and FIG.
Figure 7 explains the specific operation of the card reader/writer.
0-Tegito, Figure 6 is a diagram showing the specific transmission procedure between the card reader/writer and the IC card, Figure 7 is a block diagram showing the configuration of the IC chip built into the IC card, and Figure 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 element (CPU), 16... Data memory, 17...・
・Groda Ram Memory, 19.20...Dekaba Sofa,
23...Control circuit. Agent Patent Attorney Nori Chika Ken Yamashita - Figure 1 Figure 2 Figure 8 Figure 4 (Figure 5 Figure 7 Figure 8

Claims (1)

[Claims] (1) Transfer command data input from the first electronic device to the second electronic device.
A processing method in which the first 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:
A processing method comprising at least two output buffers for data output, and switching and using the output buffers according to the state of the input command data. (2
) The second electronic device uses the second output buffer when it determines that the input command data is abnormal in the message, and uses the first output buffer in other states. Processing method described.