Authentication system, authentication apparatus, authentication target apparatus, authentication method, method of being authenticated, program and information recording medium
US7237110B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 2003 |
| Grant date | Jun 26, 2007 |
| Priority date | — |
| Expiry date | Jan 24, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/80
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An observation unit of an authentication apparatus and an observation unit of an authentication target apparatus observe a radio wave from a common radio star at a common observation time. A sending unit sends information message including information on the observed radio wave, and an information reception unit receives it. An estimation unit estimates a position of the authentication target apparatus based on “the information on the radio wave observed by the observation unit” and “information on the radio wave observed by the observation unit”. A retaining unit pre-retains positions of one or more authentication target apparatus(s). A determination unit checks whether a position of the authentication target apparatus pre-retained in the retaining unit and the estimated position correspond within a predetermined error range, and settles authentication for the information message as a success in a case where the positions correspond.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.