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Conference Papers Year : 2021

On Preventing SAT Attack with Decoy Key-Inputs


The globalized supply chain in the semiconductor industry raises several security concerns such as IC overproduction, intellectual property piracy and design tampering. Logic locking has emerged as a Design-for-Trust countermeasure to address these issues. Original logic locking proposals provide a high degree of output corruption-i.e., errors on circuit outputsunless it is unlocked with the correct key. This is a prerequisite for making a manufactured circuit unusable without the designer's intervention. Since the introduction of SAT-based attacks-highly efficient attacks for retrieving the correct key from an oracle and the corresponding locked design-resulting design-based countermeasures have compromised output corruption for the benefit of better resilience against such attacks. Our proposed logic locking scheme, referred to as SKG-Lock, aims to thwart SAT-based attacks while maintaining significant output corruption. The proposed provable SAT-resilience scheme is based on the novel concept of decoy key-inputs. Compared with recent related works, SKG-Lock provides higher output corruption, while having high resistance to evaluated attacks.
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lirmm-03359458 , version 1 (30-09-2021)



Quang-Linh Nguyen, Marie-Lise Flottes, Sophie Dupuis, Bruno Rouzeyre. On Preventing SAT Attack with Decoy Key-Inputs. ISVLSI 2021 - IEEE Computer Society Annual Symposium on VLSI, Jul 2021, Tampa, United States. pp.114-119, ⟨10.1109/ISVLSI51109.2021.00031⟩. ⟨lirmm-03359458⟩
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