Navigation apparatus and information distribution system
US8261083B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 15, 2008 |
| Grant date | Sep 4, 2012 |
| Priority date | — |
| Expiry date | Sep 29, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2111
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A CPU of a navigation apparatus stores public keys to which priorities are set and which are published by an information distribution center in a public key storage section. The CPU of the navigation apparatus extracts an electronic signature of distribution data which is distributed from the information distribution center and verifies the electronic signature by using only ‘valid’ public keys among the public keys in order of the priorities. The CPU of the navigation apparatus determines that the distribution data is valid information which is distributed from the information distribution center when the electronic signature passes verification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.