Anti-theft device
AssigneeImpsys AB
InventorsChrister Johansson, Bengt Törngren
Life of this patent
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Abstract
The present invention relates to an electronic anti-theft device for computers and other processor-assisted electronics, such as memory components, hard disks, plug-in boards and processors. The anti-theft device comprises a blocking circuit which is integrated with the component to be protected, said circuit comprising a memory for storing a specific identity code (ID-code) for each blocking circuit. In addition, the circuit comprises an input for inputting a key code into the circuit, and a comparator for comparing the introduced key code with the ID-code of the circuit, the circuit being adapted to block the component from further use in case of an incorrect key code.
Claims26
Electronic anti-theft system for computers and processor-assisted electronics, characterized in that it comprises:
- a component to be protected;
- and
- a blocking circuit integrated with the component to be protected, the blocking circuit comprising:
- a first memory area for storing a specific identity-code (ID-code) unique to the blocking circuit;
- a second memory area for storing a serial number unique to the component;
- and
- a time-delaying unit for delaying, during a pre-set time-period, a blocking of the component,
- wherein the blocking circuit is adapted to block the component from further use in case of a non-correct key-code.
Electronic anti-theft system for computers and processor-assisted electronics, characterized in that it comprises:
- a component to be protected;
- and
- a blocking circuit integrated with the component to be protected, the blocking circuit comprising:
- a first memory for storing a specific identity-code (ID-code) unique to the blocking circuit;
- and
- a time-delaying unit for delaying, during a pre-set time-period, a blocking of the component,
- wherein the blocking circuit is adapted to block the component from further use in case of a non-correct key-code.
An anti-theft blocking circuit, comprising:
- a first memory area for storing a specific identity-code (ID-code) unique to the blocking circuit;
- and
- a second memory area for storing a serial number unique to a component, the component being a device to which the blocking circuit is integrated,
- wherein some bits of the ID-code are masked so that the blocking circuit will not block the operation of the component if only a portion of a key-code received by the blocking circuit matches only a portion of the ID-code.
An anti-theft blocking circuit, comprising:
- a first memory area for storing a specific identity-code (ID-code) unique to the blocking circuit;
- a second memory area for storing a serial number unique to a component, the component being a device to which the blocking circuit is integrated;
- and
- a time-delaying unit for delaying, during a pre-set time-period, a blocking of the component from further use in the case of a non-correct key-code.
Dependencies are inferred from the claim text.