Patent ID: 9015500
Filing Date: 2015-04-21
Classification: G06F,G09C,H04L

Abstract:
1. A method operational within an electronic device, comprising: implementing a Physical Unclonable Function (PUF) circuit; obtaining a first set of output bits from the PUF circuit by operating the PUF circuit at a first supply voltage level or first input frequency; changing at least one of the first supply voltage level to a second supply voltage level or the first input frequency to a second input frequency, the second supply voltage level different than the first supply voltage level and the second input frequency different than the first input frequency; obtaining a second set of output bits by operating the PUF circuit at the second supply voltage level or the second input frequency, the second set of output bits at least in part different than the first set of output bits, wherein the first set of output bits and the second set of output bits are obtained in response to a same input challenge to the PUF circuit; and generating secure data using at least a portion of the first set of output bits and at least a portion of the second set of output bits.