Methods and apparatus for delegation of cryptographic servers for capture-resilient devices
US7373499B2 · kind B2 · utility
3Cited by
12References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2002 |
| Grant date | May 13, 2008 |
| Priority date | — |
| Expiry date | May 29, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/3249
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Improved cryptographic techniques are provided by which a device that performs private key operations (e.g., signatures and/or decryptions), and whose private key operations are protected by a password, is immunized against offline dictionary attacks in case of capture by forcing the device to confirm a password guess with a designated entity or party in order to perform a private key operation, and by which the initiating device may dynamically delegate the password-checking function (i.e., confirmation of the password guess) from the originally designated entity or party to another designated entity or party.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.