Secure key management using control vector translation
US4993069A · kind A · utility
31Cited by
18References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1989 |
| Grant date | Feb 12, 1991 |
| Priority date | — |
| Expiry date | Nov 29, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/04
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A cryptographic system and method is provided which accepts a key K encrypted under a key formed by exclusive-ORing a key-encrypting key KK with a first control vector C5 and outputs the same key K encrypted under a key formed by exclusive-ORing KK with a second control vector C6. The set (C5, C6) represents a mapping of the type and usage of the key K defined by the control vector C5 to the type and usage defined by the control vector C6. The set of allowable control vector mappings, that is from C5 to C6, are defined in a control vector translation table, which is specified in advance by authorized installation personnel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.