Patent Document ID: 20110181470
Application ID: 12657677
Patent Flag: 0

Claim One:
1. A method for geo-security comprising: receiving at a device RF communication signals transmitted from N multiple distinct classes of RF communication systems; extracting at the device from the RF communication signals N signal parameters x′ that are time-invariant and location-dependent; computing at the device a current geotag T from the signal parameters x′ and a public identifier P associated with a geo-secured function of the device; comparing at the device the current geotag T′ with a stored geotag T; and executing at the device the geo-secured function based on the result of the comparison of the current geotag T′ with the stored geotag T; wherein computing the geotag from the signal parameters comprises: quantizing the N signal parameters x′ to produce N corresponding quantized signal parameters q′; computing a vector c′ from q′ and P; and computing the geotag T from c′ using Reed-Solomon decoding and a hash function.