Cryptology ePrint Archive: Report 2017/290

Double DIP: Re-Evaluating Security of Logic Encryption Algorithms

Yuanqi Shen and Hai Zhou

Abstract: Logic encryption is a hardware security technique that uses extra key inputs to lock a given combinational circuit. A recent study by Subramanyan et al. shows that all existing logic encryption techniques can be successfully attacked. As a countermeasure, SARLock was proposed to enhance the security of existing logic encryptions. In this paper, we re- evaluate the security of these approaches. A SAT-based at- tack called Double DIP is proposed and shown to success- fully defeat SARLock-enhanced encryptions.

Category / Keywords: applications / logic encryption, circuit obfuscation

Original Publication (in the same form): Proceedings of Great Lake Symposium of VLSI, 2017

Date: received 29 Mar 2017

Contact author: haizhou at northwestern edu

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Version: 20170403:154215 (All versions of this report)

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