System and method providing disconnected authentication
US8966276B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2004 |
| Grant date | Feb 24, 2015 |
| Priority date | — |
| Expiry date | Apr 29, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/80
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a system for disconnected authentication, verification records corresponding to given authentication token outputs over a predetermined period of time, sequence of events, and/or set of challenges are downloaded to a verifier. The records include encrypted or hashed information for the given authentication token outputs. In one embodiment using time intervals, for each time interval, token output data, a salt value, and a pepper value, are hashed and compared with the verification record for the time interval. After a successful comparison, a user can access the computer. A PIN value can also be provided as an input the hash function. A portion of the hash function output can be used as a key to decrypt an encrypted (Windows) password, or other sensitive information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.