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

Claim 14:
15. A computerized system useful for generating a symmetric key, comprising:
at least one processor configured to execute instructions;
a memory containing instructions when executed on the processor, causes the at least one processor to perform operations that:
obtain a sensor signal from a sensor of a mobile device;
determine one or more sampling points on said 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;
extract a sensor signal value at one or more sampling points, and wherein the one or more sampling points of the sensor signal are randomly selected;
obtain another sensor signal from another type sensor, wherein the other sensor signal comprises a short-wavelength radio transmission signal;
extract 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;
generate the symmetric key from one or more sampled sensor signal value and the other sensor signal value of the other type sensor; and
encrypting an electronic message generated with the mobile device with the symmetric key.