Identification of integrated circuits

A device effective to identify integrated circuits, the device comprising:

• a storage unit effective to store an identification number for an integrated circuit;
• a processor configured in communication with the storage unit;
• the processor effective to perform or cause to be performed:
• evaluate measurements of one or more attributes for one or more circuit elements of the integrated circuit, wherein the measurements are associated with corresponding input vectors applied to the integrated circuit;
• determine scaling factors for the selected one or more circuit elements, wherein the scaling factors reflect a relationship between nominal values for the attributes and measured values for the attributes;
• transform the determined scaling factors for the selected one or more circuit elements to generate transformed scaling factors;
• and
• generate the identification number of the integrated circuit based on the transformed scaling factors.

A combination of an integrated circuit and a device, the device effective to identify integrated circuits, the combination comprising:

• the integrated circuit, wherein the integrated circuit is associated with an identification number and includes one or more circuit elements;
• and
• the device,
• the integrated circuit effective to:
• receive one or more input vectors at inputs of the one or more circuit elements;
• and
• generate outputs of the one or more circuit elements in response to the one or more input vectors;
• the device effective to perform or cause to be performed:
• evaluate measurements of one or more attributes for one or more circuit elements of the integrated circuit, wherein the measurements are associated with corresponding input vectors applied to the integrated circuit;
• determine scaling factors for the selected one or more circuit elements, wherein the scaling factors reflect a relationship between nominal values for the attributes and measured values for the attributes;
• transform the determined scaling factors for the selected one or more circuit elements to generate transformed scaling factors;
• and
• generate the identification number of the integrated circuit based on the transformed scaling factors.