JP2000172360A - Personal computer robbery prevention system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively prevent a personal computer from being robbed. SOLUTION: This system is provided with a security information setting means 200 which produces an enciphered ID 41 from an ID 28 proper to a personal computer 100 based on a secret key 27, sets the enciphered ID 41 to a magnetic card 4 and sets a public key 26 for decoding the ID 28 and the enciphered ID 41 to a security checking means 1 of the computer 100 and the security checking means which reads the enciphered ID 41 from the card 4 when the computer 100 is started, decodes the enciphered ID 41 by using the set public key 26, compares the decoded ID with an ID 12 set to the computer 100 and does not start the computer 100 when they do not coincide.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a personal computer anti-theft system capable of effectively preventing the personal computer from being stolen.

[0002]

2. Description of the Related Art Conventionally, as a method for preventing the personal computer from being stolen, a metal chain is installed between a personal computer main body and a rack or a desk on which the personal computer is mounted. If so, they had to deal with theft of a personal computer by attaching a key.

[0003]

Since the conventional personal computer anti-theft system is configured as described above, it is possible to cut a metal chain or break a key with a suitable tool. However, there is a problem that is not always an effective means for preventing theft.

[0004] It is an object of the present invention to provide a personal computer anti-theft system that effectively prevents the personal computer from being stolen by making it impossible to start the stolen personal computer.

[0005]

In a personal computer anti-theft system according to the present invention, an encrypted ID is created from a PC unique ID unique to a personal computer based on a secret key, and the created encrypted ID is created. Security information setting means for setting in the magnetic card a public key for decrypting the PC unique ID and the encrypted ID in the security check means of the personal computer; The encrypted ID is read from a card, the encrypted ID is decrypted using the set public key, and the decrypted ID is compared with the set PC unique ID. And a security check means that will not be activated if they do not match. And wherein the door.

In the personal computer anti-theft system according to the present invention, an encryption ID valid only for a specific personal computer is stored in a magnetic card, and the personal computer is assigned a P ID unique to each personal computer.
Holding the C unique ID and a public key for decrypting the encrypted ID, reading the encrypted ID from the magnetic card when the personal computer is started, and decrypting the encrypted ID using the public key. , The decrypted encrypted ID and the P held by the personal computer.
By comparing the ID with the C unique ID and starting the personal computer if the IDs match, and turning off the power if the IDs do not match, making it impossible to start the stolen personal computer. To prevent personal computer theft.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below. FIG. 1 is a block diagram showing a configuration of a personal computer anti-theft system according to the present embodiment.
This personal computer anti-theft system is shown in FIG.
And a security information setting means 200 shown in FIG.
The personal computer 100 includes a security check unit 1, a power control unit 2, and a magnetic card 4. The security checking means 1 includes an ID checking means 11, a decrypting means 14, and an encrypted ID reading means 15
And so on. Security information setting means 5
Is composed of a key generation unit 21, an ID acquisition unit 22, an ID encryption unit 23, an encrypted ID setting unit 24, an ID / public key setting unit 25, and the like.

[0008] The security check means 1 and the power control means 2 are stored in the personal computer 100. The activating unit 3 is a general function of the personal computer 100 and has a function of activating the OS from the system disk after the power is turned on.

FIGS. 2 and 3 are flowcharts showing the operation of the personal computer anti-theft system.
Hereinafter, the operation will be described based on these flowcharts. 2 is a flowchart showing the operation of the security information setting means 200, and FIG. 3 is a flowchart showing the operation of the personal computer 100.

First, the key generation means 21 of the security information setting means 200 generates a public key 26 and a secret key 27 (step S1). In this case, it is convenient to use a general public key encryption algorithm for the key generation unit 21.

Next, the ID acquisition means 22 acquires and holds the ID 28 input by a human input operation or the like (step S2). The ID 28 needs to be a value unique to the personal computer 100, and it is convenient to use a serial number or the like.

Next, the secret key 2 is
7, the ID 28 is encrypted to generate an encrypted ID 41 (step S3). Next, encryption ID setting means 2
4, the encrypted ID 41 is written to the magnetic card (step S4).

Further, the public key 26 and the same ID 12 as the ID 28 are set in the security check means 1 stored in the personal computer 100 by the ID / public key setting means 25 (step S5).

When the power of the personal computer 100 is turned on, the security checking means 1 is started. As a result, the encrypted ID reading means 15 is written from the magnetic card 4 by the encrypted ID setting means 24. Read the conversion ID 41.

Next, the decryption means 14 uses the public key 26 to restore the ID from the encrypted ID 41. Next, the ID
The checking means 11 compares the ID obtained from the decoding means 14 with the ID 12 already held (step S8),
If they match, the control is passed to the start-up means 3 to execute a normal start-up process (step S9). If they do not match, the power supply control unit 2 is instructed to turn off the power (step S10).

As a result, the personal computer 100
Does not have the magnetic card 4 as a unique key, the personal computer 100 cannot be activated.

As described above, according to the present embodiment, the owner of the personal computer 100 keeps the magnetic card 4 strictly stored, so that the personal computer 1
00 can be rendered meaningless, and the theft of the personal computer 100 can be effectively prevented.

[0018]

As described above, according to the present invention, when a personal computer is stolen,
Since starting is impossible, the personal computer can be effectively prevented from being stolen.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a personal computer anti-theft system according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the security check means of the personal computer of the personal computer anti-theft system according to one embodiment of the present invention;

FIG. 3 is a flowchart illustrating an operation of a security information setting unit of a personal computer anti-theft system according to an embodiment of the present invention;

[Explanation of symbols]

1 ... security check means 4 ... magnetic card,
11 ... ID checking means, 14 ... Decoding means, 15
... Encrypted ID reading means 21 Key generating means 22
... ID acquisition means, 23 ... ID encryption means, 24 ... encryption ID setting means, 25 ... ID / public key setting means, 1
00: personal computer, 200: security information setting means.

Claims (2)

[Claims] An encrypted ID is created based on a secret key from a PC unique ID unique to a personal computer, and the created encrypted ID is set on a magnetic card.
Security information setting means for setting a public key for decrypting the PC unique ID and the encrypted ID in the security check means of the personal computer; and when starting up the personal computer, the encrypted ID is read from the magnetic card. Reading, decrypting the encrypted ID using the set public key, and decrypting the decrypted ID
And a security check unit that compares the PC unique ID with the set PC unique ID, activates the personal computer when they coincide with each other, and does not activate the personal computer when they do not coincide with each other. . 2. The security information setting means includes: a key generation means for generating a public key and a secret key;
From the PC unique ID acquired by the ID acquiring means unique to the personal computer.
ID encryption means for creating an encryption ID based on the secret key generated by the key generation means, encryption ID setting means for setting the encryption ID generated by the ID encryption means on a magnetic card, A public key generated by a key generation unit; and an ID / public key setting unit for setting a PC unique ID acquired by the ID acquisition unit to a security check unit of the personal computer, wherein the security check unit includes the magnetic card. Encryption ID reading means for reading the encryption ID set by the encryption ID setting means,
The encrypted ID read by the encrypted ID reading means
Means for decoding based on the public key set by the ID / public key setting means, the encrypted ID decrypted by the decoding means, and setting by the ID / public key setting means 2. The personal computer according to claim 1, further comprising: an ID check unit configured to compare the acquired PC unique ID, determine a match / mismatch, and control activation of the personal computer based on the determination result. Computer anti-theft system.