Volatile device keys and applications thereof
US7564345B2 · kind B2 · utility
45Cited by
33References
1Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 14, 2005 |
| Grant date | Jul 21, 2009 |
| Priority date | — |
| Expiry date | Apr 4, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/805
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A key is determined from a volatile response using circuitry on the device. The volatile response depend on process variation in fabrication of the device. Error control data that depends on the first volatile response can be computed, stored externally to the device, and then used to generate the key using a volatile response using the circuit. Applications of volatile keys include authentication and rights management for content and software.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.