Token authentication system and method
US8639628B2 · kind B2 · utility
12Cited by
7References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 23, 2005 |
| Grant date | Jan 28, 2014 |
| Priority date | — |
| Expiry date | Oct 10, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/0853
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for calculating a One Time Password. A secret is concatenated with a count, where the secret is uniquely assigned to a token. The secret can be a private key or a shared secret symmetric key. The count is a number that increases monotonically at the token with the number of one-time Passwords generated at the token. The count is also tracked at an authentication server, where it increases monotonically with each calculation of a one-time Password at the authentication server. An OTP can be calculated by hashing a concatenated secret and count. The result can be truncated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.