Identification of integrated circuits
First Claim
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.
7 Assignments
0 Petitions
Accused Products
Abstract
Techniques are generally described for generating an identification number for an integrated circuit (IC). In some examples, methods for generating an identification of an IC may comprise selecting circuit elements of the IC, evaluating measurements of an attribute of the IC for the selected circuit elements, wherein individual measurements are associated with corresponding input vectors previously applied to the IC, solving a plurality of equations formulated based at least in part on the measurements taken of the attribute of the IC for the selected circuit elements to determine scaling factors for the selected circuit elements, and transforming the determined scaling factors for the selected circuit elements to generate an identification number of the IC. Additional variants and embodiments may also be disclosed.
7 Citations
19 Claims
-
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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. An apparatus arranged to determine an identification number of an integrated circuit (IC) including circuit elements, the apparatus comprising:
-
a storage medium configured to store programming instructions; and a processor coupled to the storage medium and configured by the programming instructions to cause the apparatus, when the programming instructions are executed by the processor, to; initiate an application of input vectors to one or more of the circuit elements included in the IC; receive 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; formulate 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; solve the plurality of equations to determine the one or more scaling factors of the corresponding one or more circuit elements; and transform the determined one or more scaling factors to generate the identification number of the IC. - View Dependent Claims (19)
-
Specification