Semiconductor device with security protection function, cipherin

Details Semiconductor device with security protection function, cipherin Semiconductor device with security protection function, cipherin

1997-09-12

2000-07-18

Lee, Michael G

Registers

Records

Conductive

380 4, G06K 1906, H04L 900

Patent

active

060894601

ABSTRACT:
A semiconductor device is provided with a data security protection function. A ciphering program is given from a control device to a logic-changeable logical circuit. The logical circuit changes its logic in accordance with the ciphering program. Data to be stored is ciphered on the basis of the changed logic, and then stored in a memory device. It is possible to store the data in the memory device as it is and to cipher the data on the basis of the changed logic when the data is output from the memory device. Further, it is possible to cipher an address related to the data. Further, a deciphering program is given from the control device to the logic circuit. The logic circuit changes its logic on the basis of the deciphering program. The ciphered data is applied a deciphering process on the basis of the changed logic. The ciphering and/or the deciphering processes can be stored in a computer readable medium for causing a computer to execute those processes.

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