Key update with compromise detection
US8699713B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2011 |
| Grant date | Apr 15, 2014 |
| Priority date | — |
| Expiry date | Nov 1, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/1441
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A key is updated in a first cryptographic device and an update message comprising information characterizing the updated key is sent from the first cryptographic device to a second cryptographic device. The update message as sent by the first cryptographic device is configured to permit the second cryptographic device to detect compromise of the updated key by determining if an inconsistency is present in the corresponding received update message based at least in part on that received update message and one or more previously-received update messages. In an illustrative embodiment, the first cryptographic device comprises an authentication token and the second cryptographic device comprises an authentication server.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.