Signal generator based device security
US8630410B2 · kind B2 · utility
2Cited by
48References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2007 |
| Grant date | Jan 14, 2014 |
| Priority date | — |
| Expiry date | Aug 18, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/12
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Subsets of multiple signal generator circuits embodied in a device are selected, and then a volatile value for the device is generated from the selected subsets. The volatile value may be used for authentication of the device and/or for cryptographic procedures performed on the device. The signal generator circuits may each comprise an oscillator circuit, and the selection of the subsets may be according to a comparison of the outputs of the subsets of circuits, for example, according to a comparison of output oscillation frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.