JPS63129491A - Processing system - Google Patents

Abstract

PURPOSE:To secure a suitable timing of instruction data transmission for each type of equipment by providing a means to output a time information of a time from the time when a response data is transmitted to a second electronic equipment to the time of receiving an instruction data from a first electronic equipment. CONSTITUTION:A time information of a time necessary from the time when an IC card 1 which is the second electronic equipment transmits a response data corresponding to an instruction data to the time of receiving the following instruction data, is included in an initial response data. Accordingly, a card reader/writer 2 which is the first electronic equipment extracts the time information from the initial response data, hence can recognize the timing of the transmission of an instruction data to the IC card 1 based on the extracted time information. Therefore, the card reader/writer 2 can furnish varied transmission timings for instruction data suitable for each type of IC card 1.

Description

Detailed Description of the Invention [Objective of the Invention] (Industrial Application Field) The present invention is directed to a half-duplex transmission system in which, for example, a card reader/writer (first electronic device) and an IC card (second electronic device) perform half-duplex transmission. When the IC card receives command data from the card reader/writer, the IC card decodes the command data, executes the corresponding processing, and then sends the processing result as response data to the card reader/writer. Regarding the processing method for sending to.

(Prior Art) A first electronic device and a second electronic device exchange data by half-duplex transmission, and a reset signal from the first electronic device controls the control of the D program in the second electronic device. After that, the second electronic device receives and decodes the command data from the first electronic device, executes the corresponding processing, and sends the processing result to the first electronic device as response data. There is a processing system that sends such information. This processing system operates normally if the transmission protocol is known to the first electronic device and the second electronic device.

As an application example of such a processing system, recently Ic
A system using cards is mentioned.

Here, the transmission protocol of the IC card differs depending on the model. For this reason, the IC card informs the outside (card reader/writer) of the transmission protocol, etc., so after recognizing the reset cancellation by the reset signal, it performs an answer-to-reset (An!5Wer to Re5et).
＞Sends initial response data called ＞. Thereafter, the IC card enters a command data waiting state. In this state,
When the IC card receives command data from the outside, it reads the command data, executes the corresponding process, and then
The processing result is sent to the outside as Il'iS response data, and the state is again made to have command data. In this case, the time it takes to wait for the next command data after sending response data also differs depending on the model. However, since there is no way to recognize the difference in time, the external device (card reader/writer) that prompts the IC card to process the response data using the maximum value of the time between each model. It is necessary to set the time from receiving the command data to transmitting the command data, which has the disadvantage that it is not possible to set an appropriate timing for transmitting the command data for each IC card model.

(Problems to be Solved by the Invention) As described above, the difference in time from receiving response data corresponding to command data to transmitting the next command data due to the difference in the model of the second electronic device is electronic equipment is yl
Therefore, there is a drawback that the first electronic device cannot determine an appropriate timing for transmitting command data for each model of the second electronic device.

Therefore, the present invention aims to eliminate the above-mentioned drawbacks, and eliminates the difference in time between receiving the response data corresponding to the command data and sending out the next command data due to the difference in the model of the second electronic device. It is an object of the present invention to provide a processing method in which an electronic device can be recognized, and a first electronic device can determine an appropriate timing for transmitting command data for each model of a second electronic device.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides for a first electronic device and a second electronic device to exchange data through half-duplex transmission, and to receive and receive commands from the first electronic device. In the processing method, the second electronic device decodes the command data by receiving the data, and transmits the processing result of executing the corresponding process to the first electronic device as response data. The first electronic device is provided with means for outputting time information from when the electronic device transmits the response data to when it becomes ready to receive command data from the first electronic device.

(Operation) When the first electronic III receives the above-mentioned temporal information outputted by the second electronic device, the next command is issued after receiving the response data corresponding to the command data due to the difference in the model of the second electronic device. The first electronic device can recognize the difference in time until data is sent.

Therefore, the first electronic device can determine the appropriate timing for transmitting command data for each model of the second electronic device.

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

FIG. 8 shows an example of the configuration of a card collecting 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 is
A card reader/card reader that uses C card 1 as a card processing itl.
It can be connected to a control section 3 consisting of a CPU or the like via a writer 2, and is configured by connecting a keyboard 4, a CRT display device 5, a printer 6, and a floppy disk device M7 to the control section 3.

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 purchasing products, etc., and to store necessary data. Its functional blocks are shown in Fig. 6. 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 the function of reading, writing, or erasing data from/to the card reader/writer 2.

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 is
For example, it performs encryption to prevent leakage and forgery of communication data when transmitting data from the control unit 3 to another terminal device via a communication line, and decrypts encrypted data. DES (Data Enc.
This function performs data processing according to an encryption algorithm with sufficient cryptographic strength, such as encryption 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 various functions, the IC card 1 has a control element (for example, a CPU) as shown in FIG.
15. Nonvolatile data memory whose memory contents can be erased 1
6. Consists of a program memory 17 and a contact part 18 for obtaining electrical contact with the card reader/writer 2, of which the part within the broken line (control element 15, data memory 16, program memory 17)
is composed of one IC chip. The program memory 17 is composed of, for example, a mask ROM, and as shown in FIG.
This is used to store initial response data indicating the start of activation of the card 1. The data memory 16 is used to store various data and is composed of, for example, an EEPROM.

Is the card reader/writer 2 compatible with the IC card 1?
! This is the gate for exchanging leisure code and data with S3. Specifically, as shown in FIG. 7, a transport mechanism 21 that transports an IC card 1 inserted into a card insertion slot (not shown) to a predetermined position, an I
A contact section 22 electrically contacts the contact section 18 of the C card 1, a control circuit 23 consisting of a CPU that controls the entire system, and a control circuit 23 that exchanges command data and response data between the control circuit 23 and the control section 3. an input/output interface circuit 24 for performing data processing, a data memory 25 for storing data,
And given the initial value, rO after the elapsed time according to that value
It is composed of a decrement timer circuit 26 and the like.

Next, the operation in such a configuration will be explained.

First, the IC card 1 operates according to the flowchart shown in FIG. In other words, card reader/writer 2
When the reset signal, which is a start-up control signal, is set to a reset release state, the control element 15 outputs initial response data in the program memory 17 indicating the start of start-up within a predetermined time. This initial response data consists of time information, etc. from when the transmission protocol specification information of the IC card 1 and the response data corresponding to the command data are output until the state is ready to accept the next command data from the card reader/writer 2. has been done. Now, after outputting the above initial response data, the control element 15 enters a state of waiting for command data from the card reader/writer 2.

At this time, when command data is input from the card reader/writer 2, the control element 15 executes the basic function according to the command data, outputs response data indicating the processing result to the card reader/writer 2, and then returns to the card reader/writer 2. Return to instruction data waiting state.゛It should be noted that the command data output from the card reader/writer 2 to the IC card 1, for example,
The format is as shown in the figure, and there are two formats: a format with only a function code as shown in the figure (a), or a format with data added to the function code as shown in the figure (b).

The card reader/writer 2 operates according to the flowchart shown in FIG. In other words, in the steady state, it is in a state where it has command data from the control section 3 (step Sl). At this time, when command data is input from the control section 3, the control circuit 23 proceeds to step S2 and determines whether the input command data is an IC card import command. If it is an IC card import command, the control circuit 23 proceeds to step S3 and enters a state of waiting for IC card insertion. At this time, if it is determined that the IC card 1 has not been inserted within the predetermined time, the control circuit 23 proceeds to step S4, outputs response data indicating that the IC card has been inserted to the control unit 3, and waits for command data again. Return to state.

When it is determined that the IC card 1 has been inserted within the predetermined time,
The control circuit 23 proceeds to steps 85 and 86, supplies NH and a clock to the IC card 1, and releases the reset of the IC card 1 (hereinafter, these operations are referred to as activation). Then, the sub-surface circuit 23 proceeds to step S7 and enters a state in which it has initial response data, which means the start of activation from the IC card 1. At this time, if the initial response data is not received within the predetermined time, the control circuit 23 proceeds to step S8, outputs response data indicating a non-standard card to the control section 3, and returns to the command data waiting state again. When the initial response data is received within the predetermined time, the control circuit 23 performs step $
9, the time information in the received initial response data is extracted and stored in a built-in RAM (Random Access Memory).

Next, the control circuit 23 proceeds to step 810, and the control circuit 23 proceeds to step 810.
It is determined whether the instruction data from is a macro instruction. If it is not a macro instruction, the control circuit 23 proceeds to step 81.
1, outputs response data to the command data to the control unit 3, and returns to the command data waiting state again. If it is a macro instruction, the control circuit 23 proceeds to step 812 and determines whether the macro instruction has ended (or not after the final instruction data in the macro instruction has been sent to the IC card 1).

If the macro instruction has ended, the control circuit 23 executes step S1.
1, the response data to the macro command is output to the control unit 3, and the state returns to the command data holding state. If the macro instruction has not ended, the control circuit 23 proceeds to step 813;
A waiting state is entered until the decrement timer circuit 26 becomes "0". When the decrement timer circuit 26 reaches rOJ, the control circuit 23 proceeds to step 814 and outputs the command data to be sent to the IC card 1. The control circuit 23 then proceeds to step 815 and waits for response data from the IC card 1. At this time, if response data is not received from the IC card 1 within a predetermined time, the control circuit 231 proceeds to step S16, outputs response data indicating timeout to the control section 3, and returns to the command data holding state again. Upon receiving the response data from the IC card 1 within the predetermined time, the control circuit 23 proceeds to step 817 and sets the temporal information stored in the RAM in the decrement timer circuit 26 as an initial value.

The control circuit 23 then returns to step S10.

Repeat until all macro instructions are completed.

Note that in step S2, if it is not an IC card import command, the control circuit 23 proceeds to step 818, and reads the IC card.
It is determined whether or not after card 1 has been activated. If the IC card 1 has not been activated yet, the control circuit 23 proceeds to step 819, outputs response data indicating deactivation to the control unit 3, and returns to the command data holding state again. If the IC card 1 has been activated, the control circuit 23 moves to step S13.

In this way, by including in the initial response data the time information from when the IC card 1 sends response data corresponding to command data until it receives the next command data,
The card reader/writer 2 extracts the above-mentioned temporal information from this initial response data, and based on this extracted temporal information, the card reader/writer 2
The timing of sending command data to the C card 1 can be recognized. That is, when the card reader/writer 2 receives the above-mentioned temporal information that the IC card 1 outputs together with the initial response data, the temporal information allows the response data corresponding to the command data due to the difference in the model of the IC card 1 to be received. The card reader/writer 2 can recognize the difference in the time from 1 to sending the next command data. Therefore, the card reader/writer 2 can determine the appropriate timing for sending command data for each model of the IC card 1 using the above-mentioned time information.

In the embodiment described above, the temporal information in the initial response data is extracted and set as an initial value in the decrement timer circuit 26, and immediately before the command data is sent to the IC card 1, the decrement timer circuit 26 is activated. Although the method for confirming that the value has become "0" has been described, it is also possible to proceed to step 810 when the decrement timer circuit 26 becomes "0" after setting the temporal information. That is, the process of step 813 may be included between steps 817 and 810. Further, in this case, the decrement timer circuit 26 may be realized not by a hard timer but by a soft timer having a function similar to that of a hard timer.

Further, in the above embodiment, the temporal information is included and registered in the initial response data in advance, but the information other than the temporal information in the initial response data and the temporal information are registered separately. , a method may be adopted in which both are combined at the time of transmission. In addition, the temporal information is registered separately from the initial response data, and the temporal information is output as response data in response to the temporal information request command data from the card reader/writer 2. It's okay.

Further, in the above embodiment, the first electronic device is the card reader/writer 2 and the second electronic device is the IC card 1.
The electronic device may be used as the card reader/writer 2. In short, a first electronic device and a second electronic device exchange data through half-duplex transmission, and by receiving command data from the first electronic device, the second electronic device decodes the command data. However, any processing method is applicable as long as it executes the corresponding processing and then transmits the processing result to the first electronic device as response data.

[Effects of the Invention] As detailed above, according to the present invention, the difference in time from receiving response data corresponding to command data to transmitting the next command data due to the difference in the model of the second electronic device can be reduced. It is possible to provide a processing method in which the first electronic device can be recognized and the first electronic device can determine appropriate timing for transmitting command data for each model of 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 a card reader/writer, FIG. 2 is a flowchart explaining the operation of an IC card, and FIG. 3 is a flowchart explaining the operation of a card reader/writer.・A diagram showing the format of command data output from the writer, FIG. 4 is a diagram showing the format in the program memory of the IC card, FIG. 5 is a block diagram showing the configuration of the IC chip built into the IC card, and FIG. Figure 7 shows the functional blocks of an IC card.
FIG. 8 is a block diagram showing the configuration of the card reader/writer, and FIG. 8 is a block diagram showing the configuration of the card handling device. 1...IC card (second electronic device), 2...
...Card reader/writer (first electronic device), 1
5... Control element (CPU), 16... Data memory, 17... Program memory, 23...
... system circuit, 26 ... decrement timer circuit. Applicant's agent Patent attorney Takehiko Suzue No. 1 (b) No. 2 r? ! (a) Row Fig. 3 Fig. 40 r-11 ------- Co Fig. 5 Fig. 6

Claims (13)

[Claims] (1) The first electronic device and the second electronic device exchange data using half-duplex transmission, and by receiving command data from the first electronic device, the second electronic device transmits the command data. In a processing method in which the processing result is transmitted to a first electronic device as response data after decoding and processing corresponding to the decryption, the second electronic device transmits the response data to the next first electronic device. A processing method characterized by comprising means for outputting time information until a state is reached to receive command data from a device. (2) The process according to claim 1, wherein the temporal information is output from the second electronic device when the temporal information request command data is received from the first electronic device. method. (3) The processing method according to claim 1 or 2, wherein the temporal information is registered in advance in the second electronic device. (4) The processing method according to claim 1, wherein the second electronic device is a so-called IC card. (5) The processing method according to claim 4, wherein the first electronic device is a card processing device for reading and/or writing data to an IC card. (6) The first electronic device and the second electronic device exchange data by half-duplex transmission, and the second electronic device is activated by a control signal from the first electronic device, and the second electronic device is activated by a control signal from the first electronic device;
After startup, the electronic device transmits initial response data indicating the start of startup to the first electronic device, and then receives command data from the first electronic device to decode the command data and respond accordingly. In the processing method in which the processing result is transmitted as response data to a first electronic device after executing a process, the second electronic device transmits the response data and then receives the next command data from the first electronic device. A processing method characterized by comprising means for outputting temporal information until a receiving state is reached. (7) The processing method according to claim 6, wherein the temporal information is included in initial response data indicating the start of activation. (8) The processing method according to claim 6, wherein the control signal is a reset signal. (9) The processing method according to claim 6, wherein the temporal information is registered in advance in the second electronic device. (10) The initial response data indicating the start of activation is the second
7. The processing method according to claim 6, wherein the processing method is registered in advance in the electronic device. (11) The initial response data indicating the start of activation is the second
7. The processing method according to claim 6, wherein the processing method includes transmission protocol specification information of the electronic device. (12) The processing method according to claim 6, wherein the second electronic device is a so-called IC card. (13) Claim 12, wherein the first electronic device is a card processing device for reading and/or writing data to an IC card.
Processing method described in section.