Cryptology ePrint Archive: Report 2019/946

Dynamically Obfuscated Scan Chain To Resist Oracle-Guided Attacks On Logic Locked Design

M Sazadur Rahman and Adib Nahiyan and Sarah Amir and Fahim Rahman and Farimah Farahmandi and Domenic Forte and Mark Tehranipoor

Abstract: Logic locking has emerged as a promising solution against IP piracy and modification by untrusted entities in the integrated circuit design process. However, its security is challenged by boolean satisfiability (SAT) based attacks. Criteria that are critical to SAT attack success on obfuscated circuits includes scan architecture access to the attacker and/or that the circuit under attack is combinational. To address this issue, we propose a dynamically-obfuscated scan chain (DOSC) technique in resisting SAT attack in an obfuscated sequential design by restricting scan access only to authorized users.

Category / Keywords: applications / SAT attack, Logic locking, Secure scan, Sequential circuit unrolling, Obfuscation

Date: received 19 Aug 2019

Contact author: mohammad rahman at ufl edu

Available format(s): PDF | BibTeX Citation

Version: 20190819:163704 (All versions of this report)

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