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- W4386883103 abstract "Analog obfuscation techniques to prevent intellectual property attacks have mainly evolved from digital obfuscation. Similar to digital hardware security, the considered threat models commonly assume that the attacker possesses the circuit netlist, specifications, and bias information to deobfuscate a locked analog circuit. However, when one or more pieces of information remain unavailable, there is an adverse effect on the performance of current analog attack algorithms. In this article, an analysis of the challenges and limitations of obtaining the information needed to successfully attack an analog circuit is provided. In addition, the performance of current state-of-the-art analog attack techniques is evaluated when one or more pieces of information is unavailable. The analysis of the attack on five distinct analog circuits obfuscated with key-based parameter locking is performed, premised upon the level of information possessed by the adversary. The monotonic attack (MA) returned the correct key in less than 10 h when executing a black-box attack on single stage circuits obfuscated with a 10-bit key. The key-spacing (KS) attack is 10 <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$times$</tex-math> </inline-formula> faster than the monotonic attack and returns 8.3 <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$times$</tex-math> </inline-formula> fewer candidate keys for multistage analog circuits. The satisfiability modulo theory (SMT) based attack is 224 <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$times$</tex-math> </inline-formula> slower than the monotonic attack and 2240 <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$times$</tex-math> </inline-formula> slower than the key spacing attack for an 18-bit obfuscated circuit. A genetic algorithm (GA) based attack is 121 091 <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$times$</tex-math> </inline-formula> slower than an monotonic attack even for a single stage analog circuit. Through analysis of the results, metrics are developed to characterize the setup and evaluation time of executing the deobfuscation attacks." @default.
- W4386883103 created "2023-09-21" @default.
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- W4386883103 date "2023-01-01" @default.
- W4386883103 modified "2023-09-27" @default.
- W4386883103 title "Hidden Costs of Analog Deobfuscation Attacks" @default.
- W4386883103 doi "https://doi.org/10.1109/tvlsi.2023.3296279" @default.
- W4386883103 hasPublicationYear "2023" @default.
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