Securing an integrated circuit

Details Securing an integrated circuit Securing an integrated circuit

2006-05-05

2010-06-22

Nguyen, Tuan T (Department: 2824)

Static information storage and retrieval

Read/write circuit

Having fuse element

C365S185040, C365S201000, C365S096000

Reexamination Certificate

active

07742357

ABSTRACT:
Securing an integrated circuit, including fabricating the integrated circuit to include a multiplicity of unblown efuses, at least one surrogate efuse that emulates a blown efuse, non-volatile data representing the blown state of the surrogate efuse, and security circuitry; and setting, by the security circuitry when power is first applied to the integrated circuit, a security state of the integrated circuit in dependence upon whether a sensed state of the surrogate efuse is equal to the blown state of the surrogate efuse.

REFERENCES:
patent: 6549063 (2003-04-01), Lehmann et al.
patent: 7019534 (2006-03-01), Wu
patent: 7224633 (2007-05-01), Hovis et al.
patent: 7321522 (2008-01-01), Dixon et al.

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