Circuit security

Details Circuit security Circuit security

2007-03-06

2010-12-28

Moazzami, Nasser (Department: 2436)

Cryptography

Key management

C380S028000, C711S212000, C713S193000, C713S194000, C713S176000, C713S170000, C365S189170

Reexamination Certificate

active

07860252

ABSTRACT:
A system is provided in which a first circuit is protected by security features provided by a second circuit. The first circuit comprises a processor which retrieves content from a memory. Initially, the contents of the memory are authenticated using security features of the second circuit to check that the processor is accessing authenticated content. To maintain security during use, the second circuit checks that the processor is accessing content from valid regions of the memory, being those that have been authenticated, and re-checks the authenticity of the content of the valid regions of memory. The combination of checking that the processor is accessing from valid regions of the memory and authenticating the content stored in the valid regions maximizes the security of the system. If any of the checking or authentication steps fail then operation of the system is impaired. The first circuit is thus protected by security features provided by the second circuit.

REFERENCES:
patent: 5790669 (1998-08-01), Miller et al.
patent: 6401208 (2002-06-01), Davis et al.
patent: 6571335 (2003-05-01), O'Donnell et al.
patent: 2009/0150923 (2009-06-01), Patariu et al.

Affiliated with

Also associated with

Rating

Circuit security does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Circuit security, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit security will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4197869