The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 2012
Filed:
Jan. 25, 2010
Geosecurity methods and devices using geotags derived from noisy location data from multiple sources
Di Qiu, Menlo Park, CA (US);
Sherman Lo, San Mateo, CA (US);
David S. DE Lorenzo, Palo Alto, CA (US);
Dan Boneh, Palo Alto, CA (US);
Per Enge, Mountain View, CA (US);
Di Qiu, Menlo Park, CA (US);
Sherman Lo, San Mateo, CA (US);
David S. De Lorenzo, Palo Alto, CA (US);
Dan Boneh, Palo Alto, CA (US);
Per Enge, Mountain View, CA (US);
The Board of Trustees of the Leland Stanford Junior University, Palo Alto, CA (US);
Abstract
In a geo-security system, a device receives RF signals from multiple distinct classes of RF communication systems and extracts location-dependent signal parameters. A current geotag is computed from the parameters by fuzzy extractors involving quantization of the parameters and Reed-Solomon decoding to provide a reproducible unique geotag. The current geotag is compared with a stored geotag, and a geo-secured function of the device is executed based on the result of the comparison. The use of multiple signal sources of different types, combined with special fuzzy extractors provides a robust geotag that allows both lower false rejection rate and lower false acceptance rate.