Method and apparatus for increasing security in a system...

Details Method and apparatus for increasing security in a system... Method and apparatus for increasing security in a system...

2011-06-28

2011-06-28

Barnie, Rexford N (Department: 2819)

Electronic digital logic circuitry

Security

Reexamination Certificate

active

07969179

ABSTRACT:
An integrated circuit can be made more secure by programming a one time programmable circuit so that different signals are provided on terminals as compared to when the integrated circuit was not secure. Instead, or in addition, the integrated circuit can be made more secure by providing decode circuitry that can be used with the one time programmable circuit to select different internal address maps in response to an address value. The decode circuitry can use a first address map when the integrated circuit is secure, and a different address map when the integrated circuit is non-secure.

REFERENCES:
patent: 4812675 (1989-03-01), Goetting
patent: 5638520 (1997-06-01), Moyer
patent: 6298400 (2001-10-01), Candelore
patent: 7103782 (2006-09-01), Tugenberg et al.
patent: 7479798 (2009-01-01), Reese

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