Patent ID: 8811614
Filing Date: 2014-08-19
Classification: G01S,H04B,H04K,H04W

Abstract:
1. A method for location-based authentication using medium earth orbit (MEO) and low earth orbit (LEO) satellites, the method comprising: receiving at a server a client MEO signal signature comprising samples over an MEO signature time period of at least one client received MEO satellite signal received at a client device from at least one MEO satellite; constructing a server MEO signal signature comprising samples over the MEO signature time period of at least one server received MEO satellite signal received from the at least one MEO satellite; comparing the client MEO signal signature and the server MEO signal signature to provide an MEO comparison result; receiving at the server a client LEO signal signature comprising samples over an LEO signature time period of at least one client received LEO satellite signal received at the client device from at least one LEO satellite; constructing a server LEO signal signature comprising samples over the LEO signature time period of at least one server LEO satellite signal of the at least one LEO satellite, the server LEO signal signature comprising the samples comprising secure codes from at least two beams overlapping an asserted location of the client device; comparing the client LEO signal signature and the server LEO signal signature to provide an LEO comparison result; and authenticating that the client device is at the asserted location based on the MEO comparison result and the LEO comparison result to authenticate the asserted location of the client device.