Access control
US7660994B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 2004 |
| Grant date | Feb 9, 2010 |
| Priority date | — |
| Expiry date | Feb 8, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06Q90/00
- WIPO fieldIT methods for management
- WIPO sectorElectrical engineering
Abstract
An administration entity controls access to an electronic device by generating credentials and a plurality of corresponding proofs, wherein no valid proofs are determinable given only the credentials and values for expired proofs. The electronic device receives the credentials and, if access is authorized at a particular time, the electronic device receives a proof corresponding to the particular time and confirms the proof using the credentials. A single administration entity may generate the credentials and generate the proofs and/or there may be a first administration entity that generates the credentials and other administration entities that generate proofs. The credentials may be a digital certificate that includes a final value that is a result of applying a one way function to a first one of the proofs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.