JPS63241683A - Portable electronic equipment - Google Patents

Abstract

PURPOSE:To release a safe and secure lock condition with a legal user by storing refreshing conditions composed of the combination of plural instructions, and comparing an input instruction with the refreshing conditions at the time of the lock condition and executing the lock releasing at the time of coincidence. CONSTITUTION:In a data memory 12, individual reference data Eid and refreshing conditions data Er to release an IC card 11 from a lock condition when the number of times of the noncoincidence of collation of an Eid arrives at a prescribed value are stored. At the time of the lock condition, a refreshing command to set a refreshing mode is inputted from a keyboard. Thereafter, in accordance with refreshing conditions Rc set to the refreshing conditions data Er from a keyboard beforehand, a command is successively inputted, a refreshing command to show the completion of a command input finally is inputted, the inputted command and the refreshing conditions set beforehand are collated, and at the time of coincidence, the lock is released.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a portable electronic device called an IC card, which includes an integrated circuit including, for example, a memory and a control circuit.

(Prior Art) As is well known, an IC card uses a built-in control element to access a data memory, such as an EEPROM, and input/output necessary data in response to an external request. There is.

This IC card has personal standard data stored in the data memory as identification information for confirming the legal owner of the IC card, and personal standard data and personal standard data input from the card handling device to which this IC card is installed. The validity is determined by comparing it with individual standard data.

By the way, in the above-mentioned IC card, the number of mismatches is counted, and when this number of mismatches reaches a predetermined value, the IC card becomes locked and cannot be accessed. .

A refresh command is provided as means for releasing the locked state, and by inputting this refresh command, the locked state can be released. However, for security reasons, only the card issuer can use this refresh command, and general IC card holders cannot use the refresh command. Therefore, if the IC card becomes locked, the IC card owner must take the IC card to the issuer and have it unlocked.
It was extremely inconvenient.

(Problems to be Solved by the Invention) The purpose of the invention is to solve the problem that when a portable electronic device becomes locked, the locked state cannot be released by the legal owner. The purpose is to provide a portable electronic device that can be safely and reliably unlocked by its legal owner.

[Structure of the Invention (Means for Solving Problems)] The present invention provides a storage means for storing a refresh condition constituted by a combination of a plurality of instructions, and a memory means for storing a refresh condition constituted by a combination of a plurality of instructions, an instruction input in a locked state, and the refresh condition. and, if they match, the locked state is released.

(Operation) This invention stores a refresh condition consisting of a combination of a plurality of instructions in a storage means, and when a lock state occurs,
The input command and the stored refresh conditions are checked by the control means, and if they match, the locked state is released, thereby making it possible to release the locked state reliably and safely.

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

FIG. 5 shows a card handling device to which an IC card as a portable electronic device is applied, and this card handling device is used as a terminal device in, for example, a financial system or a shopping system. This device includes a card reader/writer 2 into which an IC card 1 is attached, a control unit 3 that exchanges information with the IC card 1 via the card reader/writer 2, a keyboard 4 connected to the control unit 3, and a CRT. It consists of a display device 5, a printer 6, and a floppy disk drive H7.

FIG. 6 shows the structure of the IC card 1. As shown in FIG. This IC card 1 includes a control element 11 as a control unit (CPU), a nonvolatile data memory 12 in which necessary data is stored and whose storage contents can be erased, a program memory 13 in which programs are stored, and the card reader. - Consists of a contact portion 14 for making electrical contact with the writer 2. Among these, the control element 11, data memory 12, and program memory 13 within the broken line are constituted by one IC chip, and are embedded in the IC card 1.

Next, the gist of the invention will be explained.

FIG. 1 shows the information stored in the data memory 12. This data memory 12 includes, in addition to normal data (not shown), personal reference data Eid as identification data.
Refresh condition data Er for releasing the IC card 11 from the locked state is stored when the number of times of matching and non-matching of this personal reference data Eid reaches a predetermined value.

FIG. 2 shows the refresh condition data Er. This refresh condition data Er is composed of a refresh condition length R1 and a refresh condition RC. This refresh condition Rc is composed of a command sequence in which arbitrary commands are arranged in sequence, and the type of command to be used, the order in which the commands are arranged, and the length of the refresh condition RC can be set arbitrarily by the authorized user. It has become. In this case, a write command, a read command, and an erase command are arranged in sequence.

In the above configuration, a refresh operation when the IC card 11 is in a locked state with the IC card 11 attached to the card reader/writer 2 will be described.

First, a refresh command, for example, for setting a refresh mode is inputted from the keyboard 4, and the control unit 3 and control element 11 are set to the refresh mode. In this state, when commands are input sequentially from the keyboard 4 according to the refresh condition RC preset in the refresh condition data Er, and finally a refresh command is input again to indicate the end of command input, each of the input commands This is compared with preset refresh conditions, and if they all match, the locked state is released.

FIG. 3 shows an example of the operation of the control element 11. In this control element 11, in step ST1, it is determined whether or not the input command is a refresh command indicating the end of command input, and if it is determined that it is a command other than this, in steps ST2 to ST4, The contents of flag table FT are determined. This flag table is configured in accordance with the refresh condition RC as shown in FIG. " is set, and in the initial state, all flags are cleared to "0".

Every time a command is input, the state of the flag in the corresponding part of the flag table FT is determined in steps ST2 to ST4, and if it is determined that the flag is O'', the control goes to steps ST5 to ST7. Control is transferred to these steps ST5 to ST7.
Then, the input command is compared with the command in the corresponding part set in the refresh condition RC, and only if they match, the corresponding part in the flag table FT is changed in steps ST8 to 5T10. 7 lag "1" is set.

That is, in the flag table FT, the refresh condition Re
When a command is input in the order and type set in , a flag "1" is set in the corresponding part.

With the required commands input in this way, if you input the refresh command again, step 5
In TII, all flags in flag table FT are '
1'' is set, and if it is set, a refresh operation is executed in step STI 2 and the lock state is released. After this, in step 5T13, the flag table 13 is cleared. In addition, if all the flags in the flag table F'T are not set to "1", the flag table 13 is cleared in step 5T13 and the refresh operation is not performed. is terminated.

According to the above embodiment, the refresh condition Rc configured by a combination of arbitrary commands is stored in the data memory 12.
is set and the IC card 11 becomes stuck,
By inputting a command according to the refresh condition RC, the locked state can be released by the legitimate owner.

Therefore, even if the IC card 11 becomes locked as in the conventional case, there is no need to take the IC card 11 to the issuer, which facilitates the unlocking process. .

In addition, the refresh condition RC is only validly owned by WgwA.
It is highly confidential because it is a combination of commands that are
This is more secure than the conventional case where it can be canceled only by a refresh command.

Note that this invention is not limited to the above embodiments,
Of course, various modifications can be made without departing from the gist of the invention.

[Effects of the Invention] As described in detail above, according to the present invention, a refresh condition consisting of a combination of a plurality of instructions is stored in the storage means, and when a lock state is reached, the input instruction and the memory The portable electronic device can be safely and reliably unlocked by an authorized user by comparing the refresh conditions and the refresh conditions set by the control means and releasing the locked state if they match. Can be provided.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention, and FIGS. 1 and 2 are diagrams shown to explain refresh condition data, respectively, and FIGS. 3 and 4 are diagrams shown to explain an example of refresh operation. 5 is a block diagram showing an example of a card handling device, and FIG. 6 is a block diagram showing an example of an IC card. 1...IC card, 11...control element, 12...
Data memory, Er...Refresh condition data. Applicant's agent Patent attorney Takehiko Suzue Figure 1 C Figure 2 Figure 4

Claims (2)

[Claims] (1) When the number of mismatches in identification data that identifies a legal owner reaches a predetermined value, a refresh condition configured by a combination of multiple instructions is stored in a portable electronic device that is locked in an inaccessible state. 1. A portable electronic device comprising: storage means for storing the refresh conditions; and control means for comparing a command input in a locked state with the refresh conditions and releasing the locked state if they match. (2) The portable electronic device according to claim 1, wherein the control means compares the input command with refresh conditions stored in the storage means in the refresh mode.