Double key protection method for computer peripheral and architecture for the same
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United States of America Patent
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Issued Date -
Jan 26, 2006
app pub date -
Dec 15, 2004
filing date -
Jul 20, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A double key protection method is adapted to computer peripherals and architecture for the same. The present invention equips at least one microprocessor and one storage unit on a computer peripheral, and executes a client program in the computer. A first key is used to check whether the computer peripheral is copyrighted and a second key is used to check whether the client program is copyrighted. The software designer should set a first key value and store the first key value in a storage unit, and then indicate a second key value. Then the microprocessor executes a key procedure and produces a first cyclic redundancy check and programs the second key value and the first cyclic redundancy check into the client program. When operating the client program, the client program can be checked for copyright by checking the first cyclic redundancy check.
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