Patent ID: 11863538
Assignee: nan
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of useful for generating a symmetric key comprising:
with a processor of a mobile device,
obtaining a sensor signal from a sensor;
determining one or more random sampling points on the sensor signal with a randomization algorithm, wherein the sensor comprises a global positioning system (GPS)-related data from the mobile device, wherein the sensor signal comprises one or more GPS signal time stamps, wherein the GPS-related data comprises a GPS signal time stamp;
extracting a sensor signal value of the one or more GPS signal time stamps at the one or more sampling points, and wherein the one or more sampling points of the sensor signal are randomly selected by the randomization algorithm;
determining one or more random sampling points on the sensor signal with a randomization algorithm,
obtaining another sensor signal, wherein the other sensor signal comprises a short-wavelength radio transmission signal;
extracting another sensor signal value at another set of sampling points of the other sensor signal, wherein the other sensor signal value comprises a signal strength of the other sensor signal;
generating the symmetric key from a sampled sensor signal value of the one or more GPS signal time stamps and the other sensor signal value; and
encrypting an electronic message generated with the mobile device with the symmetric key.