Patent ID: 11921834
Assignee: STMICROELECTRONICS (ROUSSET) SAS
Field: Computer technology (Electrical engineering)
Classification: CPC G  B | IPC B  G

Claim 20:
21. A system, comprising:
a first electronic circuit; and
a second electronic circuit, which, in operation, is coupled to the first electronic circuit, wherein:
the first electronic circuit, in operation:
receives a request from the second electronic circuit to generate a first digital signature based on digital states of a plurality of electric nodes distributed, according to a topography, within the first electronic circuit, the request identifying or including code executable by the first electronic circuit; and
generates the first digital signature in response to the request, the generating including:
executing the code, the executing of the code influencing the digital states of all or part of the plurality of electric nodes of the first electronic circuit; and
combining the digital states of the plurality of electric nodes of the first electronic circuit; and

the second electronic circuit, in operation:
generates a second digital signature based on digital states of a plurality of electric nodes distributed, according to the topography, within the second electronic circuit;
compares the first digital signature to the second digital signature; and
authenticates the first electronic circuit based on the comparison.