Cryptographic authentication apparatus, systems and methods
US8707037B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 17, 2008 |
| Grant date | Apr 22, 2014 |
| Priority date | — |
| Expiry date | Sep 4, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/805
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Apparatus, systems, and methods send an interrogation command from an interrogation and timing apparatus to a timed identification (TID) apparatus. The TID apparatus receives the interrogation command, performs a series of logical operations to calculate a response, and returns the response within a maximum length of time established by the interrogation and timing apparatus. The interrogation and timing apparatus confirms that the length of time between sending the interrogation command and receiving the response is within the maximum length of time and that the response is correct. If so, the TID apparatus is authenticated. Additional embodiments are disclosed and claimed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.