Apparatus for protecting code ROM data in code ROM test

Details Apparatus for protecting code ROM data in code ROM test Apparatus for protecting code ROM data in code ROM test

2006-06-13

2006-06-13

Smithers, Matthew (Department: 2137)

Electrical computers and digital processing systems: support

Data processing protection using cryptography

By stored data protection

C714S030000

Reexamination Certificate

active

07062659

ABSTRACT:
Disclosed is a method and apparatus of a code read only memory (ROM) data capable of protecting code ROM data is easily read and plagiarized in field in case of testing a code ROM built-in a microcontrol unit (MCU) The apparatus for protecting data outputted from a code ROM has: a first encryptor for encrypting data outputted from the code ROM; a second encryptor for generating a read enable signal through an encryption process; and an output unit for dumping out the encrypted data outputted from the first encryptor in response to the read enable signal outputted from the second encryptor.

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patent: 2001-325153 (2001-11-01), None
patent: 2000-038712 (2000-07-01), None

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