Method and apparatus for using navigation signal information for geoencryption to enhance security
US8391488B2 · kind B2 · utility
7Cited by
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19Claims
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Key dates
| Filing date | Jan 15, 2009 |
| Grant date | Mar 5, 2013 |
| Priority date | — |
| Expiry date | Dec 18, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/80
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A data encryption and decryption system securely geoencrypts data using location-dependent navigation signals. To increase the entropy of the cryptographic key to guard against a brute-force attack, geoencryption is made to depend on largely time-independent characteristics of the navigation signals that are not easily spoofed, including the time difference of arrival, the envelope-to-cycle difference, the differential signal-to-noise, the signal envelope shape, and the directions of arrival of the navigation signal set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.