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<p>This research focuses on hardware obfuscation strategies to safeguard digital signal processing (DSP) systems against threats such as piracy, overbuilding, and reverse engineering. It explores logic obfuscation techniques that introduce structural complexity through randomness, multi-layer abstraction, and the insertion of dummy (fake) gates. Additionally, the study investigates high-level transformation (HLT)-based obfuscation to enhance structural security, combined with functional techniques like logic locking. A key-based obfuscation mechanism is employed, wherein a secret key is embedded in the integrated circuit (IC) and activated during the power-up phase, ensuring that only authorized users can access the DSP intellectual property (IP). Experimental evaluation on an obfuscated finite impulse response (FIR) filter demonstrates a significant improvement in security, while also achieving a reduction in power consumption (5.915 mW) compared to a non-obfuscated FIR filter (7.504 mW). These results confirm that the proposed obfuscation techniques not only strengthen protection against unauthorized access and reverse engineering but also offer potential energy efficiency benefits.</p>

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Securing DSP IPs: A Comprehensive Study on Logic and Structural Obfuscation Techniques

  • 期刊论文

  • 发表日期：

    2026年3月30日

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  • R. Naveenkumar,
  • N. M. Sivamangai,
  • S. Sridevi Sathayapriya,
  • A. Napolean

摘要

This research focuses on hardware obfuscation strategies to safeguard digital signal processing (DSP) systems against threats such as piracy, overbuilding, and reverse engineering. It explores logic obfuscation techniques that introduce structural complexity through randomness, multi-layer abstraction, and the insertion of dummy (fake) gates. Additionally, the study investigates high-level transformation (HLT)-based obfuscation to enhance structural security, combined with functional techniques like logic locking. A key-based obfuscation mechanism is employed, wherein a secret key is embedded in the integrated circuit (IC) and activated during the power-up phase, ensuring that only authorized users can access the DSP intellectual property (IP). Experimental evaluation on an obfuscated finite impulse response (FIR) filter demonstrates a significant improvement in security, while also achieving a reduction in power consumption (5.915 mW) compared to a non-obfuscated FIR filter (7.504 mW). These results confirm that the proposed obfuscation techniques not only strengthen protection against unauthorized access and reverse engineering but also offer potential energy efficiency benefits.