Encoding a validity period in a password
US8667295B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 4, 2009 |
| Grant date | Mar 4, 2014 |
| Priority date | — |
| Expiry date | Jan 1, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/84
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A password authentication mechanism is capable of determining whether a password has expired without referring to a database or other information repository. Additional information can be encoded in the password without unduly lengthening the password, so that the additional information can be extracted from the password when the user provides the password for authentication purposes. Thus, the password serves as an information-carrying data item as well as acting as an authentication mechanism. Such a password can be used, for example, to provide time-limited access to a vehicle in response to receipt of timely payment, and to disable the vehicle if payment is not made.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.