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A technique to build a secret key in integrated circuits for identification and authentication applications

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6 Author(s)
Lee, J.W. ; Comput. Sci. & Artificial Intelligence Lab., MIT, Cambridge, MA, USA ; Lim, D. ; Gassend, B. ; Suh, G.E.
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This paper describes a technique that exploits the statistical delay variations of wires and transistors across ICs to build a secret key unique to each IC. To explore its feasibility, we fabricated a candidate circuit to generate a response based on its delay characteristics. We show that there exists enough delay variation across ICs implementing, the proposed circuit to identify individual ICs. Further. the circuit, functions reliably over a practical range of environmental variation such as temperature and voltage.

Published in:

VLSI Circuits, 2004. Digest of Technical Papers. 2004 Symposium on

Date of Conference:

17-19 June 2004