Timing Camouflage Enabled State Machine Obfuscation

Michaela Brunner, Tarik Ibrahimpasic, Bing Li, Grace Li Zhang, Ulf Schlichtmann, Georg Sigl

Publikation: Beitrag in Buch/Bericht/KonferenzbandKonferenzbeitragBegutachtung

2 Zitate (Scopus)

Abstract

State machine obfuscation is an important step to harden circuits against reverse engineering. The work presents a state machine obfuscation enabled by Timing Camouflage. Flip-flops of state machines often have a combinational feedback path. This makes it challenging to directly apply Timing Camouflage. Therefore, we developed two methods to redesign a state machine, such that at least one of its flip-flops is free of combinational feedback paths while the original functionality stays the same. The Timing Camouflage enabled state machine obfuscation additionally allows a beneficial combination with logic locking. The results demonstrate that state-of-the-art techniques fail to extract a correct state machine or show decreased success in extracting a correct secret locking key from an obfuscated design.

OriginalspracheEnglisch
Titel2022 IEEE Physical Assurance and Inspection of Electronics, PAINE 2022
Herausgeber (Verlag)Institute of Electrical and Electronics Engineers Inc.
ISBN (elektronisch)9798350399097
DOIs
PublikationsstatusVeröffentlicht - 2022
Veranstaltung2022 IEEE Physical Assurance and Inspection of Electronics, PAINE 2022 - Huntsville, USA/Vereinigte Staaten
Dauer: 25 Okt. 202227 Okt. 2022

Publikationsreihe

Name2022 IEEE Physical Assurance and Inspection of Electronics, PAINE 2022

Konferenz

Konferenz2022 IEEE Physical Assurance and Inspection of Electronics, PAINE 2022
Land/GebietUSA/Vereinigte Staaten
OrtHuntsville
Zeitraum25/10/2227/10/22

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