Method an apparatus for encrypting and decrypting microprocessor serial numbers
US5774544A · kind A · utility
88Cited by
4References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1996 |
| Grant date | Jun 30, 1998 |
| Priority date | — |
| Expiry date | Mar 28, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2463/062
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for encrypting and decrypting a microprocessor serial number. First and second encryption keys and a serial number are provided in microprocessor machine specific registers. The serial number is encrypted using the first key. The encrypted serial number is encrypted using the second key. The first encryption key may be encrypted along with the serial number using the second key. The double encrypted serial number is then stored in memory provided for that purpose.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.