JPS6026784A - Locking apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a locking device for various devices and other objects, and an object of the present invention is to improve the reliability of the locking device by making it difficult to unlock it by unauthorized means, and to facilitate the production of keys. With the goal.

Various types of locking devices are already in use.
Examples include metal keys, numeric keys, magnetic cards, electronic keys, and photoelectric punch cards. The information these keys carry is their shape for metal keys;
A numeric keypad has a combination of numbers, a magnetic card has a combination of magnetic polarities, an electronic key has wiring between each bin, and a photoelectric punch card has a hole arrangement.

In the information held by these keys, the numeric keypad,
It is relatively easy to change the information on photoelectric punch cards, and it is possible to change the information on magnetic cards if you have a writing device, but each key is Changes are only made artificially if necessary.

That is, unless the information is artificially changed, the information held by the key is constant. With the same type of key as subordinate block C1,
It is necessary to change all the information held by each key in advance, and there are problems such as keys being relatively easy to duplicate.

The present invention uses a non-volatile memory in which data can be written and erased as a key device, and each time data of the key device is input to a lock device and the lock device outputs a signal to an external device, It is characterized by erasing the data in the memory and rewriting it with different data.

The memory used in the key device of the present invention may be volatile and capable of storing and erasing data such as core memory, floppy disk, CMOS, EEPRO, etc.
M or magnetic tape can be used.

The locking device of the present invention will be explained with reference to the embodiment shown in FIG. 1, which consists of a key device (1) and a separate locking device (
2) A non-volatile memory that can write and erase device data (
3) and 1. In this example, EEPROM is used as a non-volatile memory, so the memory (3) is connected to a connector (4) for inputting data to it and for outputting it. has been done. (5
) is a connector provided on the lock device (2), which can be connected to the connector (4) of the key device (1).

(6) connects memory (3) via connectors (4) and (5).
A read/write circuit for reading data from one memory (3), erasing the data in one memory (3), and writing new data again; The same data as the current data is input from the read/write circuit (6). It compares the data read from the memory (3) to determine whether the two data match or not, and stores the next new and different data. (8) is a random number. The output of this circuit is the data processing circuit (7) which outputs different data number 4B every time.
) Tori-f'' Conflict 5 I} 'jilpath (6) Ni input J＞-ru.

Then, the data processing circuit (7) stores the data signal outputted by the data generation circuit (8) as the next different data described above.

(9) Hariito write circuit (6) and data processing circuit (
Based on the human input signal from (7), both circuits (6), (
7) and a control circuit which outputs signals in line with the data generation circuit (8) and controls each circuit; (10) is an external device, which is controlled by the output signal of the control circuit (9);

To unlock this locking device, the key device (1) is connected to the locking device (2) by connecting the connectors (4) and (5).

When the key device (1) is connected, a key connection signal is input from the read/write circuit (6) to the control circuit (9). When the control circuit (9) confirms the input of the key connection signal, the read/write 1 is activated by the control signal from the control circuit (9).
: The circuit (6) provides a read address to the memory (3) of the key device (1). The memory (3) that receives the read address reads the data signal at the specified address.
Manually power the light circuit (6). In this way, note 1
When the read/write circuit (6) reads all the data of the circuit 3), the read/write 1 circuit (6) inputs the data signal to the data processing circuit (7).

The read/write circuit (6) reads the same data as the data written in the memory (3) that it has already stored;
The memory input from the read/write circuit (6)
3) and the data read from the control circuit l'i! (9), and if both data match, the data processing circuit (7) inputs a match signal to the control circuit (9). The control circuit (9) that has received the coincidence signal inputs a new data generation signal to the data generation circuit (8). By applying this signal, the data generation circuit 1 (8) manually inputs random numbers and other new data different from the previous data to the data processing circuit (7) and read/write circuit (6), and transfers the data to the data processing circuit (7). ) is stored for next verification. The read/write circuit (6) then provides the input new data together with the write address to the memory (3) of the key device (1), and the write pulse causes all of the new data to be written into the memory (3). On the other hand, the data processing circuit (7
), the control circuit (9) receives a coincidence signal from the external device (1
0) and turn it on or off, for example.

After unlocking is completed in this way, insert the key device (1) into the lock f.
Separate from fi(2). Repeat the above operations to unlock and lock the door.

The data processing circuit (7) compares the data it has with the data read from the memory (3), and if they do not match, a mismatch signal is input to the control circuit V11 (9). Ru. Therefore, in this case, no signal is output from the control circuit (9) to the control device (10), unlocking is impossible, and the data of the key device (1) is not changed.

In this embodiment, since EEFROM is used as the memory (3) of the key device (1), connectors (4) and (5) are required to connect it to the read/write circuit (6). Of course, if a magnetic card is used as the memory (3), the connectors (4) and (5) become unnecessary. In other words, key equipment! (1) can be achieved by connecting the lock device (2) to the lock device (2) so that data can be exchanged in accordance with the memory (3) used therein.

To explain the case where a magnetic card is used as the memory (3) of the key device 1 (1), in this case, the lock device (
2) is provided with a card insertion slot, and a read/write circuit is arranged to read data from the card inserted into the insertion slot, erase the data, and write new data. Unlocking in this example is similar to the previous example; when a magnetic card is inserted into its insertion slot, the data is read, the data is verified by the data processing circuit (7), and the data processing circuit (7) 7) manually sends a match or mismatch signal to the control circuit (9). If the verified data match, the read/writer circuit (6) erases the data on the card. Then, when the card is removed, different new data is written to it.

It is also possible to use a microprocessor as the locking device (2). FIG. 2 is a block diagram of the key device (1), in which the memory (3) of the key device (1) can be connected to the I10 device (11) of the lock device (2) via a connector. (12) is RAM, (13) is ROM, (1
4) is a CPU. In this case, the data in the memory (3) shown in the embodiment of FIG. 1 and other flows are stored as a program in the ROM (13), and the CPU (+4) outputs instructions according to the flow of the program. do. Different new data signals generated for sequential writing to the memory (3) are also sequentially stored in the RAM (12). Then, when the data in the memory (3) is taken into the lock device (2) as a signal, the data held in the RAM (12) is called out by the command of CP L/ (14), and it is combined with the data in the memory (3). Verify and process. If the data match, a different new data signal is output and stored in the RAM (12) and memory (3), and the process is repeated.

As described above, in the present invention, a non-volatile memory in which data can be written and erased is used as the key device, and each time the data it has is used for unlocking etc. It is erased and new and different data is written. That is, the data held by the key RFF is changed sequentially and is not constant. Therefore, even if a key device is completely copied illegally, for example, when the correct key device is used, the data in the key device and the lock device will change, and the duplicate key will become unusable. It is impossible to operate the locking device by unauthorized means in this way, and 4r! It can be used as a highly reliable device.

When you lose a key device, you can invalidate the data on the lost key device and re-register the new data, making it impossible to use the lost key device, saving you the trouble and expense of replacing all lock devices. Is possible.

Since the key device data is written sequentially, all key devices have the same specifications and are manufactured differently. ! It can make the staff more efficient. Furthermore, since the data of the key device is entered in a usage register and changes from time to time, the data is unknown even to the manufacturer of the key device, making duplication more difficult and increasing its reliability.

[Brief explanation of the drawing]

The drawings show an embodiment of the invention, with FIG. 1 being a block diagram and FIG. 2 being a block diagram using a microprocessor. (1): Place the key, (2) Two-lock device, (3): Memory (
・1)・(5): Connector, (6): Read/write circuit (7): Data processing circuit, (8): Data generation circuit (9): Control device, (10): fi,! Device, (11
): Ilo R (12) RAM, (13) ROM
, (14): CPU patent applicant Toyo Security Security Co., Ltd. ff12 Figure 11

Claims (1)

[Claims] It consists of a key device consisting of a non-volatile memory that can write and erase data, and a lock device that outputs a signal to an external device based on the data signal of the memory, and the lock device reads the data of the memory. and means for erasing and writing data, and means for outputting a different data signal each time a signal is output to the external II.
A lock device characterized in that data in a memory of a key device is rewritten to the different data each time the lock device outputs a signal to an external device.