Method of checking the authenticity of an electric circuit arrangement
US6766452B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 29, 1999 |
| Grant date | Jul 20, 2004 |
| Priority date | — |
| Expiry date | Apr 29, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06Q20/4097
- WIPO fieldIT methods for management
- WIPO sectorElectrical engineering
Abstract
A method of checking the authenticity of a digital electric circuit arrangement is achieved in that a concatenation (6; 8, 9) of at least a few circuit-technical elements (10) of the electric circuit arrangement (1) is formed, which deviates from the normal, intended use of the circuit arrangement (1), in that a digital random value generated by the external device (2) and transferred to the electric circuit arrangement (1) is modified in said circuit arrangement by the concatenated elements (6; 8, 9) and transferred to the external device (2), in that the external device (2) compares the modified value with a check value assigned to the random value transferred to the electric circuit arrangement (1), and in that the authenticity of the electric circuit arrangement (1) is recognized only when the modified value and the check value correspond to each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.