JPS63237188A - Processing system - Google Patents

Abstract

PURPOSE:To decide the disorder of a sequence between first and second electronic devices by transmitting an instruction data, after adding a specified information to it, and investigating the specified information by a receiving side. CONSTITUTION:An IC card 1 is connected to a controlling part 3 consisting of a CPU, etc., through a card reader/writer 2. The controlling part 3 adds a first specified information to the instruction data, and outputs it. The IC card 1, having received the said instruction data, decides whether a processing, corresponding to the received instruction data, it to be executed or not, according as whether or not a prescribed relation, determined beforehand, exists between a second specified information held in it beforehand, and a first specified information added to the instruction data, and transmits a decided result to the controlling part 3.

Description

Detailed Description of the Invention [Objective of the Invention] (Industrial Field of Application) The present invention provides command data input from, for example, a card reader/writer (first electronic device M) to an IC card (second electronic device M). device) receives the command data, decodes the function code included in the command data, executes a series of processes corresponding to the command data, and then sends the processing results as response data to the card reader/writer, either once or multiple times. It relates to the processing method used.

(Prior Art) Recently, as a new portable data storage medium, an IC card having a built-in IC chip having a nonvolatile data memory and a control element such as a CPLI (central processing unit) has been developed. This type of IC card is normally operated using a card reader/writer, and command data is generally used during operation. The IC card decodes the function code in the received instruction data, executes a series of processes corresponding to the function code, and sends the processing results to the card reader/writer as response data.

At this time, the following methods are available as protective measures in case the sequence between the card reader/writer and the IC card is disturbed. In other words, the IC card adds the function code included in the command data from the card reader/writer to the response data and sends it out, and the card reader/writer that receives this adds it to the response data and matches it with the function code in the command data sent earlier. This is to confirm that the

However, in such a method, the card reader/writer receives the response data sent from the IC card,
Since the card reader/writer itself judges the sequence disturbance and decides whether to stop or continue the system, for example, if the card reader/writer's own control program goes out of control for some reason, Even if the card reader/writer sends command data to the IC card in a sequence that is contrary to the operation sequence of the IC card because it is unable to determine the disturbance in the above sequence, the IC card will not be able to perform the processing requested by the command data. I end up doing it.

(Problems to be Solved by the Invention) As described above, in the present invention, the first electronic device receives the response data sent from the second electronic device, and the first electronic device determines a sequence disturbance by itself. Because it is something that
This was done to solve the problem that if the tiIIWJ program or the like of the first electronic device goes out of control, it is not possible to determine whether the sequence is disturbed. To provide a processing system in which a second electronic device can determine the disturbance, and therefore the second electronic device itself can play cards even if a control program of a first electronic device goes out of control.

[Configuration of the Invention (Means for Solving the Problems)] The present invention provides a system in which a second electronic device receives command data input from a first electronic device, and decodes a function code included in the command data. and after executing a series of processes corresponding to this, the processing results are sent to the first electronic device as response data, the first electronic device adding first specific information to the command data. The second electronic device that receives the information adds the command data and sends it out, and the second electronic device that receives it creates a link between the second specific information held in advance and the first specific information added to the received command data. It is characterized by determining whether or not to execute a process corresponding to the received command data based on whether or not a predetermined relationship exists, and transmitting this determination result to the first electronic device. There is.

(Operation) When the sequence between the first electronic device and the second electronic device is disrupted, the predetermined relationship between the first specific information and the second specific information disappears. Therefore, the second electronic device can determine the disturbance in the sequence. Therefore, in this case, the second electronic device denies the process corresponding to the command data and sends a notification to that effect to the first electronic device, even if the control program of the first electronic device goes out of control. The cards are played by the second electronic device itself.

(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 terminal device that handles IC cards according to the present invention. That is, this terminal device is
The C card 1 can be connected to a control section 3 consisting of a CPU or the like via a card reader/writer 2 as a card processing device, and the control section 113 can be connected to a keyboard 4, a CRT display device 5, a printer 6, and a floppy disk device 7. connected and configured.

As shown in FIG. 6, the IC card 1 is electrically connected to a control element (for example, a CPU) 11, a nonvolatile data memory 12 whose storage contents can be erased, a program memory 13, and a card reader/writer 2. The control element 11, the data memory 12, and the program memory 13) shown in broken lines are composed of one IC chip and are embedded in the tC card body. There is. The control element 11 is
The output buffer 715 for data output as shown in FIG. . The data memory 12 is used to store various data, and is composed of, for example, an EEPROM. The program memory 13 is composed of, for example, a mask ROM, and includes IIJI of the control element 11.
It stores the II program.

The card reader/writer 2 sends and receives f11 function codes and data between the IC card 1 and the control unit 3, and reads the IC card 1 based on macro instructions from the control unit 3.
It also has the function of performing one command and one response operation. Specifically, as shown in FIG. 7, a transport mechanism 21 that transports the IC card 1 inserted into a card insertion slot (not shown) to a predetermined position, and a contact section 14 of the IC card 1 set at a predetermined position. A contact section 22 electrically contacted by the controller, a control section 23 consisting of a CPLJ, etc. that controls the entire system, and an input/output interface for exchanging command data and response data between the control section 23 and the control section 3. It is composed of a 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 FIG. In other words, in a steady state, it is in a state where it has command data from the control section 3. When command data is input from the control unit 3, the control unit 23
checks whether or not the IC card 1 is in execution, and if it is in execution, sends response data indicating a multiple instruction data error to the control section 3, and returns to the instruction data waiting state again.

When the IC card 1 is not in operation, the control unit 23
The command data is sent to the IC card 1, and the state waits for response data from the IC card 1. When there is response data from the IC card 1, the control section 23 sends the response data to the control section 3, and returns to the command data waiting state again.

Here, the command data sent from the card reader/writer 2 to the IC card 1 has a format as shown in FIG. There are two types of information: one in which information is added, and the other in which only function code and serial number information are added as shown in FIG.

The serial number information is stored in the control unit 2 in the card reader/writer 2.
3, and is added to the instruction data as described above and sent to the IC.
Sent to card 1. It is assumed that the sequential number information starts from a specific initial value (for example, the numerical value 1).

Next, the IC card 1 operates according to the flowchart shown in FIG. Note that when sending command data for the first time, the response serial number information storage section 1 of the output buffer 15
It is assumed that the content of 52 is "OO". In the steady state, it is in a state of waiting for command data from the card reader/writer 2. When command data is sent from the card reader/writer 2 and input to the control element 11, the control element 11 receives the serial number information in the input command data and the response serial number information storage section 15 of the output buffer 15.
2. It is determined whether there is a predetermined relationship between the contents of That is, for example, it is determined whether or not a value obtained by subtracting "1" from the sequential number information in the command data is stored in the response sequential number information storage section 152 of the output buffer 15. If there is a predetermined relationship between the serial number information in the command data and the contents of the response serial number information storage section 152, the control element 11 will control the input command data. The function of deciphers the hood, executes the corresponding processing, and outputs the processing result as a buffer? 15 is stored in the processing result storage unit 153.

Also, at this time, the control element 11 outputs the function code in the instruction data to the output buffer? 15 response function code storage section 15
1, and information obtained by converting the sequential number information in the instruction data according to a predetermined function, such as the value obtained by multiplying the sequential number information by 2 (that is, converting the sequential number information into 2
multiplied value) is stored in the response serial number information storage section 152 of the output buffer 15. Then, the control element 11 sends the contents of the output buffer 15 (function code, function-converted sequential number information, processing result) to the card reader/writer 2 as response data, and returns to the command data holding state again.

Also, output buffer? 15 response serial number information storage unit 1
52 does not contain the above-mentioned value (that is, the sequential number information in the command data and the response sequential number information storage section 1
52), the control element 11 determines that the sequence between the IC card 1 and the card reader/writer 2 has been disrupted, and responds to the command data. Deny the process and output a serial number information error message Processing result storage section 1 of the buffer 115
At the same time, the function code in the command data is stored in the response function code storage section 151 of the output buffer 715. Then, the control element 11 outputs the contents of the output buffer 715 as response data to the card reader/writer 2, and returns to the command data holding state again.

Note that when the card reader/writer 2 sends command data for the first time, the sequential number information added thereto is set to a specific initial value, for example, the numerical value "1", and thereafter, when response data is received from the IC card 1, Sequential number information is generated by counting up the function-converted sequential number information added thereto by one, and is added to the command data to be sent next time.

FIG. 4 shows a specific transmission procedure between the card reader/writer 2 and the IC card 1. For example, the function code (A
) is shown in a concrete sequence when the command data is sent out four times in a row. Regarding the first transmission of command data, the sequential number information is "1J1".The sequential number information of the response data to this is converted (doubled) by a function and becomes "2". Next, the serial number information of the command data for the second transmission is the value "3", which is the serial number information "2" of the response data for the first command data counted up by one, and the serial number information of the response data for this The number information is converted into a function and becomes “6
”. Next, the serial number information of the command data for the third transmission is 1lIr, which is the serial number information "6" of the response data for the second command data counted up by one.
7J, and the serial number information of the response data to this is converted into "14" by a function. Then, the serial number information of the command data for the fourth transmission is the value "15", which is obtained by counting up by one the serial number information "14" of the response data for the third command data, and the serial number of the response data for this. The information is converted into a function and becomes "30".

In the above specific example, if a disturbance in the sequence occurs, for example, during the second transmission of command data, the sequential number information in the command data will not be "3" but will be a value other than that.

Therefore, there is no predetermined relationship between the sequential number information in the command data and the contents of the response sequential number information storage section 152 of the output buffer 15. That is, the value obtained by subtracting "1" from the sequential number information in the command data does not become "2", and does not match the contents of the response sequential number information storage section 152, which is "2" at this time.

Therefore, in this case, the IC card 1 determines that a sequence disturbance has occurred, negates the processing corresponding to the command data, and sends response data indicating this to the card reader/writer 2.

With this type of system, the card reader/writer 2 and I
If the sequence with the C card 1 is disrupted, the sequential number information (first specific information) in the instruction data and the output buffer 7
Since there is no longer a predetermined relationship with the contents of the response serial number information storage section 152 (second specific information) of No. 15, the IC card 1 can determine the disturbance in the sequence. Therefore, in this case, the IC card 1 denies the process corresponding to the command data and sends a notification to that effect to the card reader/writer 2, causing the vIWJ program etc. of the card reader/writer 2 (control 11 section 23) to run out of control. Even in this case, the IC card 1 itself can be used.

Note that in the above embodiment, the first electronic device is a card reader/
In this example, the second electronic device is the IC card 1 in the writer 2, but for example, the first electronic device is the ilJ tl1 part 3.
Alternatively, the second electronic device may be the card reader/writer 2. In short, the second electronic device receives command data input from the first electronic device, decodes the function code included in the command data, executes a series of processes corresponding to this, and then outputs the processing results. The above first response data
Any processing method that sends data to an electronic device is applicable.

[Effects of the Invention] As described in detail above, according to the present invention, the second electronic device can determine a disturbance in the sequence between the first electronic device and the second electronic device, and therefore the first electronic device It is possible to provide a processing method in which the second electronic device itself can play cards even if the control program of the device goes out of control.

[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 an IC card, FIG. 2 is a flowchart explaining the operation of a card reader/writer, and FIG. 3 is a flowchart explaining the operation of a card reader/writer. - A diagram showing an example of the format of command data sent from the writer, Figure 4 is a diagram explaining the specific transmission procedure between the card reader/writer and the IC card, and Figure 5 is a diagram showing an example of the format of command data sent from the writer. output buffer? FIG. 6 is a block diagram showing the structure of the IC card, FIG. 7 is a block diagram showing the structure of the card reader/writer, and FIG. 8 is a block diagram showing the structure of the terminal device. 1... IC card (second electronic device), 2... Card reader/writer (first electronic device), 3... Ill
11 parts, 11... control element (CPU), 12... data memory, 13... program memory, 15...
Output buffer 7.23...Control unit. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 3 Figure 5

Claims (5)

[Claims] (1) Transfer command data input from the first electronic device to the second electronic device.
The first electronic device receives the command data, decodes the function code included in the command data, executes a series of processes corresponding to the command data, and then sends the processing results to the first electronic device as response data. The first electronic device adds first specific information to command data and sends it, and the second electronic device that receives this adds the second specific information held in advance and the received command. Determine whether or not to execute the process corresponding to the received command data based on whether or not there is a predetermined relationship with the first specific information added to the data, and make this determination. A processing method characterized in that a result is sent to the first electronic device. (2) The processing method according to claim 1, wherein the judgment result is that only a result in which the judgment is negative is sent to the first electronic device. (3) The process is executed only when the determination result is positive, and then the second specific information is updated with the first specific information. processing method. (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.