Method of operating a microcomputer system

Details Method of operating a microcomputer system Method of operating a microcomputer system

2006-08-15

2006-08-15

Moise, Emmanuel L. (Department: 2137)

Electrical computers and digital processing systems: support

Data processing protection using cryptography

By stored data protection

Reexamination Certificate

active

07093138

ABSTRACT:
A method of operating a microcomputer system in which at least part of a memory system of the microcomputer system is checked for manipulation of data stored in the memory system. Measures to prevent processing of the data in the microcomputer system are performed as a function of the result of the check, if the measures are activated. The measures are activated or deactivated as a function of the content of a read-only memory of the microcomputer system. To increase the effectiveness and reliability of a manipulation or tuning protection of the data, a code word is stored in the data, which is checked while the microcomputer system is in operation, and the measures are activated or deactivated as a function of the result of the check of the code word stored in the data.

REFERENCES:
patent: 6032257 (2000-02-01), Olarig et al.
patent: 6178509 (2001-01-01), Nardone et al.
patent: 6466048 (2002-10-01), Goodman
patent: 6948071 (2005-09-01), Schneider et al.
patent: 197 23 332 (1998-09-01), None
patent: WO 00/75759 (2000-12-01), None

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