JP2683341B2 - IC card - Google Patents

Description

TECHNICAL FIELD The present invention relates to an IC card used for recording certain information, processing the information, and receiving a specific service.
In particular, the IC card is inserted into an external input / output device such as a reader / writer, and in response to a start signal from the reader / writer, the IC card provides the reader / writer with predetermined data necessary for processing by the IC card. The present invention relates to an IC card used in an IC card system in which processing can be started only after outputting. (Prior Art) An IC card has a built-in CPU and memory, and is used in various service institutions by utilizing its data processing function.
Because of its small shape and functionality, it is carried by various people and used in various devices for data input / output. Such devices include cash dispensers at banks, various vending machines, terminals for POS systems, cash registers at shops, and the like. The user of the card inserts the card into these devices, accepts the IC card, and interacts with the connected host computer as necessary.
Various services will be started while interacting with the IC card. (Problems to be solved by the invention) Some input / output devices accept a plurality of different services, and some accept only one specific type of service such as a vending machine. Must pre-determine whether the input IC card is a card that the input / output device can accept. Such criteria are like rules for processing work between the IC card and the input / output device. If such a protocol is called a protocol, the protocol includes a technical standard for communication and processing of electric signals, a so-called communication protocol, and an IC card service organization and an IC card issued or authorized by the organization. There are rules regarding the information of the IC card that has been settled, that is, the attributes of the IC card. Therefore, since the IC card is also judged by such an input / output device, the above-mentioned two types of communication protocols and IC card attribute data must be recorded. The communication protocol is purely technical, and almost all IC cards will have a common standard.
The communication protocol data includes communication frequency, communication speed, transmission control method, error detection method, internal voltage value, and the like. These data are fixed and rarely changed on the way. The input / output device that accepts the IC card receives the communication protocol data from the IC card and determines whether it is compatible with its own system. If it is a different method, the IC
The card cannot be serviced by its I / O device. IC card attribute data include the following. Information on the manufacturing history of the IC card, such as symbols for identifying the manufacturer of the internal IC chip, the IC card module manufacturer, the IC card issuer, etc., the issue date, the IC card validity period, etc. . In addition, a special mark that prevents the card from being forged and a code of the IC card itself to verify whether the IC card has been lost or stolen can be used as IC card attribute data as necessary. Therefore, the attribute data has a function of identifying whether the IC card is accepted by the service organization of the input / output device, and a function of security of the IC card. Such IC card attributes are different from communication protocols and are not always fixed information. Such information or rules may be individually set between the service organization and the card user after the IC chip or the IC card is manufactured, or may be changed during the use due to some circumstances. In addition, there are cases where you want to update it regularly. In conventional IC cards, all communication protocol and manufacturing history information data that is checked prior to accessing the information in the IC card must either be recorded in a non-rewritable memory such as a mask ROM, or a personal identification number. Since a part of the manufacturing history information was checked as a part of the IC card information processing after the access to the IC card was permitted after the input of, the above convenience and demand could not be satisfied. (Means to solve the problem) In order to solve the above problems, if the IC card attribute check is performed prior to the access to the actual IC card information, it means that the card is incompatible. In case of failure, you can immediately find it and return the card as unacceptable before entering the password or menu of the desired service, saving unnecessary processing time. . Also, with so-called prepaid cards used in vending machines etc., usually personal personal identification numbers are not entered, and if you check the communication protocol and the attribute data of the IC card, you can immediately provide services and it is convenient. Focusing attention, in the present invention, a storage unit including a storage area in which a communication protocol of the IC card is stored and a rewritable storage area in which attributes of the IC card are stored, and an input / output device in which the IC card is inserted In response to the operation start signal from the
It is configured to have a part that reads the attributes of the IC card and transfers them to the input / output device. (Effect of the invention) Communication protocol and IC prior to information processing with the IC card
The attribute of the card and the attribute of the card are first transferred to the input / output device, and the IC card records the attribute data in the rewritable memory, so that the following excellent effects are obtained. . In a short time, it can be determined whether the IC card itself can receive the service, and no unnecessary processing time is required. The security of the information on the IC card can be double protected. . It is possible to prevent unauthorized use of cards and unauthorized use of services. . Depending on the usage history of the card, it can be updated to the appropriate IC card attribute data to provide a wider and more convenient service. (Embodiment) FIG. 2 shows an operation sequence between an IC card and its input / output device, for example, an IC card reader / writer. When the IC card is inserted into the reader / writer at step 00, the operating voltage and the clock signal are supplied from the reader / writer to the IC card, and the IC card signal can be input / output. next,
In the step 01 answer insert, the fixed byte (for frequency and transmission rate ratio detection) which is the communication protocol data from the IC card, the transmission control method, the error detection and correction method,
The application time of the value of V _pp (write voltage), and transfers the Burotsukusaizu and IC card attribute data. The reader / writer receives the protocol data and the attribute data in step 02.
In step 03, it is checked whether the received protocol data and attribute data are compatible with the reader / writer system. If they are not compatible, an error notification is issued in step 04, and the subsequent processing is stopped. If the protocol data and attribute data from the IC card match those of the reader / writer, the reader / writer and IC card will be
You can perform the steps from ~ 12 to provide the service by the IC card. Next, an embodiment of an IC card according to the present invention will be described with reference to the drawings. The storage section of the IC card is provided with a storage area for recording the above-mentioned communication protocol data and IC card attribute data, in addition to an area for storing normal information and an area for storing a personal identification number. The communication protocol data is
Since it is fixed information, it is stored in a non-rewritable memory such as a mask ROM. The IC card attribute data is stored in a rewritable memory so that it can be corrected and updated as needed. The address of the attribute data may be determined in advance and the address may be written in the control program. FIG. 3 shows the rewritable memory of the embodiment of the present invention.
A storage area for recording IC card attribute data is shown. In the figure, 15 bytes from the first address to the Fth address, that is, T1 to TF bytes, is the history data of the IC card, for example,
Record the card manufacturer, date of manufacture, issuer, date of issue, etc. The 0th address is the TK information byte,
This is an index area for accessing the IC card attribute area. In this embodiment, the IC card attribute storage area is 15 bytes, but the present invention is not limited to this, and the number of bytes can be defined as needed. Many ICs depending on the number of bytes
Card attribute data can be recorded. Figure 4 shows the index byte (TK
Information byte). The most significant bit (ETK) of the same byte is for indicating whether or not data is recorded in this IC card attribute storage area, where 0 is recorded and 1 is not recorded. The lower 4 bits (NTK bits) of the same byte record the total number of bytes (excluding the TK information byte) in the IC card attribute recording area. If this number of bytes is fixed, the NTK bit is unnecessary and
Only the TK bit is required. That is, only one bit is required as a flag indicating the presence / absence of data in the IC card attribute data storage area. In that case, the other 7 bits of the TK information byte can be used for purposes other than indexing. Also, if the program is such that the IC card attribute storage area is always read out, the ETK bit can be omitted. When the IC card is issued, predetermined data is recorded in these storage areas and given to the card user. FIG. 1 shows the details of step 01 of the unsert reset of the IC card of FIG. When power, clock, etc. are supplied from the reader / writer, first, in step 100, the communication protocol data is transferred to the reader / writer. Next, in step 101, the ETK bit of the TK information byte in the IC card attribute storage area is read out, and if ETK = 0 is not satisfied, the operation proceeds to step 105 to wait for a command. If the command is from the reader / writer side, step 06 and subsequent steps in FIG. 2 will be executed. Step 101
If ETK = 0, the number of bytes of the NTK bit is read at step 102. In step 103, the first byte to the Fth
Among the bytes, the IC card attribute data of the number of bytes designated by the NTK bit, for example, IC card history information, is read and transferred to the reader / writer. However, if the number of bytes of the NTK bit is fixed, step 102 can be omitted. Further, if the IC card attribute storage area is a program that always reads out, the step 101 can be omitted. At step 104, a check is made to see if all the bytes have been read, and if not all the steps are repeated. When all bytes have been read, step 105 waits for a command. FIG. 5 shows a schematic structure of the IC in the IC card. CP in the figure
U is an information processing control unit of the IC card, and in many cases,
A RAM for temporary storage is attached. The mask ROM is a non-rewritable storage unit, and predetermined data among communication protocol and attribute data may be stored here. The PROM (for example, EEPROM) is a rewritable storage unit, and of the attribute data, data that is scheduled to be rewritten or updated later is stored here. The basic control program of the IC card is stored in the mask ROM and controlled by the CPU. The personal identification number is stored in a predetermined storage area of the mask ROM or PROM. As a rewritable memory
In addition to EEPROM, RAM backed up by a power supply can also be used. FIG. 6 shows a further embodiment of the step 01 of FIG. 2, which is basically the same as that of FIG.
It differs from the one shown in Fig. 1 in that the reading of the IC card attribute storage area and the transfer to the card writer are performed for each byte. Only different parts will be described. At step 110, the contents of the first byte are first read and stored in the buffer memory in advance without being immediately transferred to the reader / writer. At the same time, the counter is counted one. Step 11
At 1, it is checked whether the count value of the counter has reached the number of bytes read at step 102. If not, the process returns to step 110 to read the next and second byte and temporarily store them in the buffer memory. When these steps are performed for the number of bytes of NTK bit, step 113 transfers the data in the buffer memory to the reader / writer. FIG. 7 shows the reader / driver in response to step 01 of FIG.
This shows the processing of step 02 on the writer side in more detail. First, when communication protocol data is transferred from the IC card, step 200 receives it. Step 201
Then, the communication protocol data is read from the storage unit of the reader / writer, collated with the data transferred from the IC card, and checked whether they match. For verification, in step 201, the correct communication protocol may be read from the host computer connected to the reader / writer. If the communication protocol transferred from the IC card is not suitable, error processing is performed in step 203. If the communication protocol is suitable, at step 204, the attribute data from the IC card is fetched. In step 205, the judgment standard of the attribute data is read from the storage unit of the reader / writer or the host computer, and it is judged whether the attribute data transferred from the IC card is compatible with the service of the reader / writer. It This judgment is the leader
It may be performed inside the writer or may be performed by the host computer. In step 206, if the attribute data of the IC card is not compatible with the IC card system, the error processing of step 207 is proceeded to, and if it is compatible, the command output of step 208 is proceeded to. FIG. 8 shows a flow of writing (updating) data to the IC card attribute data storage area when the IC card is issued. First, in step 300, the IC card is initialized.
In step 301, the write command and the write attribute data are input to the IC card. This write command includes the number of NTK bytes and the secret code (number,
Character or code) is included. At step 302, it is determined whether the input command is a write command. If it is not a write command, other processing is executed in step 303. In the case of a write command, the personal identification number is collated with that of a predetermined storage area in the IC card in step 304. If the personal identification numbers do not match, the fact is notified in step 305. If there is a match, step 3
At 06, the IC card attribute data is written in the IC card attribute data storage area. When writing is complete, the step
At 307, the number of NTK bytes is recorded in the index area of the IC card. Next, at step 308, the ETK bit of the index area is set from 1 to 0. Then, in step 309, I
Notify that C card attribute data writing is complete and end.
When the NTK bit and ETK bit are not used, steps 307 and 308 are omitted. When changing or rewriting the attribute data on the way, it is basically performed according to the flow chart of FIG. In this case, when new attribute data is written in step 306, the previous data is automatically erased. In the above description of the embodiments, the number of rewriting of attribute data is not particularly limited, but it is convenient for the use of the IC card to limit the number of rewriting of attribute data to any number from 0 to a predetermined number. There are cases. For example, this is a case where the same card is manufactured in a batch, and then different times are set according to the card issuing destination. As an example, if the content of the IC card attribute data is the expiration date of the IC card, assuming that the expiration date is not updated, the first PR
If you write to the attribute data storage area of OM once,
Rewriting is performed 0 times, that is, rewriting is impossible. If the expiration date can be updated, the number of times is set. This rewritable count setting means can be implemented, for example, by using an empty bit of the TK information byte in FIG. 4 as a counter. That is, if 3 bits are used, rewriting can be set 0 to 7 times. It should be noted that such a rewriting number limiting means is not limited to the above-mentioned means, and known means can be used. The flow of rewriting when the number of rewritings is limited is basically the same as that of FIG. 8, but a step of reading the count value of the number of rewritings and a step of incrementing the counter by 1 after rewriting are added to the flow of FIG. It For example, the count value may be read after step 304 in FIG. 8 and the counter may be incremented by 1 after step 309.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart showing an embodiment of reading IC card attribute data of an IC card in the present invention. FIG. 2 is a basic flow chart of the exchange between the IC card and the reader / writer. FIG. 3 is a diagram showing a structure of a storage area of attribute data in the IC card of the present invention. FIG. 4 is a diagram showing the structure of the TK information byte in FIG. FIG. 5 is a schematic diagram showing the structure of the IC inside the IC card. FIG. 6 is a flow chart showing another embodiment of reading attribute data in the IC card of the present invention. FIG. 7 is a flow chart showing the operation of the reader / writer in which the IC card of the present invention is inserted. FIG. 8 is a flow chart for writing attribute data in the IC card of the present invention.

Claims (1)

(57) [Claims] Insert the IC card into the input / output device,
An IC card used in an IC card system capable of performing information processing by the IC card after transferring predetermined data from the IC card, the storage area storing the communication protocol of the IC card and the IC card attribute of the IC card Before the input of the PIN and the service menu, etc., the storage means for the predetermined data including a rewritable storage area in which is stored,
The rewritable memory, which has a means for reading the communication protocol and the IC card attribute data from the storage means in response to an operation start signal from the input / output device and transferring the data to the input / output device. The IC stored in the area
An IC card, wherein the card attribute is information relating to a service usage range of the IC card, and the information can be rewritten. 2. The IC card according to claim (1), characterized in that the storage means has an area for recording index information of the rewritable storage area. 3. In claim (2), the storage means has means for rewriting the contents of the IC card attribute of the rewritable storage area in response to a rewrite command signal from the outside. card. 4. The IC card according to claim (3), wherein the means for rewriting the contents of the IC card attribute includes means for limiting the number of rewritable times to a predetermined number.