Patent ID: 8417754
Filing Date: 2013-04-09
Classification: G01R,G06F

Abstract:
1. A method for a computing device to generate an identification number of an integrated circuit (IC) including circuit elements, the method comprising: initiating an application of input vectors to one or more of the circuit elements included in the IC; receiving measurement values responsive to the application of input vectors, wherein the measurement values correspond to values measured for one or more attributes of the one or more circuit elements in response to the application of input vectors; formulating a plurality of equations based on the corresponding measured values, wherein each of the plurality of equations includes one or more scaling factors of the corresponding one or more circuit elements, where the scaling factors reflect a relationship between nominal values for the attributes and the measurement values for the attributes; solving the plurality of equations to determine the one or more scaling factors of the corresponding one or more circuit elements; and transforming the determined one or more scaling factors to generate the identification number of the IC.