Method and system for generating time-based identifiers
US7581108B1 · kind B1 · utility
9Cited by
8References
22Claims
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Key dates
| Filing date | Apr 21, 2004 |
| Grant date | Aug 25, 2009 |
| Priority date | — |
| Expiry date | Sep 2, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/088
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Methods and systems for generating time-based identifiers that are used for identifying items is described. In one embodiment, a master key is assigned to an electronic tag. Time-based other keys are generated based on the master key. Time-based identifiers are generated based on the time-based other keys. The time-based identifiers are useful only for a period of time to a holder of the time-based other keys.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.