Systems and methods for detecting tampering of a computer...

Details Systems and methods for detecting tampering of a computer... Systems and methods for detecting tampering of a computer...

2006-04-25

2006-04-25

Sheikh, Ayaz (Department: 2136)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Protection at a particular protocol layer

C713S002000, C713S193000

Reexamination Certificate

active

07036023

ABSTRACT:
A computer system that contains a boot signature checker is disclosed. In one example, the boot signature checker monitors the bus connecting the processor with the memory and provides a boot signature that is a function of the signal sequence detected on the bus. If an unauthorized user tampers with the operating system within the memory as when attempting to gain unauthorized access to presentable content such as television programming, the boot signature checker will in all probability produce a different boot signature than expected. The decrypter will respond to this different boot signature by, for example, deactivating thereby potentially preventing an unauthorized user from gaining access to presentable content.

REFERENCES:
patent: 5935249 (1999-08-01), Stern et al.
patent: 6026293 (2000-02-01), Osborn
patent: 6141530 (2000-10-01), Rabowsky
patent: 6401208 (2002-06-01), Davis et al.
patent: 6625730 (2003-09-01), Angelo et al.

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