Patent ID: 7945791

Claim:
An integrated circuit, including: at least one physical parameter network that provides a physical datum, wherein the physical datum is related to at least one manufacturing parameter of the integrated circuit; at least one combiner for coding at least one first datum to be protected by being combined with the physical datum provided by said physical parameter network, wherein: the coding provides at least one protected datum, the physical parameter network comprises a plurality of electrical paths and the physical datum comprises a plurality of bits, and each electrical path from the plurality of electrical paths provides a respective bit from the plurality of bits; at least one decoder for, in read mode, decoding the at least one protected datum by reusing the physical datum to provide back the at least one first datum; and a first memory for storing said at least one protected datum; wherein the at least one combiner is associated with means for invalidating its operation after a writing of the at least one protected datum into a first memory of the integrated circuit.