Patent ID: 8219857

Claim:
A method for generating at least one identifier for uniquely identifying an electronic device, wherein the electronic device contains a number of static storage elements, and wherein the method comprises: cycling power provided to the static storage elements multiple times; reading values of the static storage elements after the power cycling to collect a set of power-up states; repeating the cycling and reading for multiple environmental temperatures of the device to collect the sets of power-up states for the multiple environmental temperatures; and computing the at least one identifier from the collected sets of power-up states by computing an expected value of the power-up state for the static storage elements for the multiple environmental temperatures from the set of power-up states collected for the corresponding environmental temperature, and combining the expected value for the multiple environmental temperatures to generate a unified expected value for the static storage elements, wherein the at least one identifier includes fields expressing the unified expected value of the power-up state of at least some of the static storage elements for the multiple environmental temperatures.