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Hologram-based structural obfuscation for DSP cores

Hologram-based structural obfuscation for DSP cores

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This chapter highlights an alternative paradigm for the design of structurally obfuscated digital signal processing (DSP) cores inspired by security hologram. Discussion on different structural-obfuscation techniques have been included in this chapter with emphasis on the algorithms used for obfuscation during design synthesis of high-level synthesis (HLS). The chapter is organized as follows: Section 8.1 introduces the importance of obfuscation for IP cores during the system-on-chip design process; Section 8.2 discusses the background on security hologram; Section 8.3 highlights the possible use of applying the hologram concept for structural obfuscation; Section 8.4 explains the hologram-based obfuscation methodology for DSP cores; Section 8.5 presents illustrative examples for hologram-based obfuscation on DSP cores; Section 8.6 discusses the process of determination of gate count for un-obfuscated and obfuscated designs; Section 8.7 presents a demonstration and examples of high-level transformation-based obfuscated DSP circuits; Section 8.8 presents design examples of un-obfuscated (baseline) DSP circuits; Section 8.9 presents analysis on case studies; Section 8.10 concludes the chapter.

Chapter Contents:

  • 8.1 Introduction
  • 8.2 Background on hologram
  • 8.3 Applying hologram concept for structural obfuscation
  • 8.4 Hologram-based obfuscation methodology
  • 8.4.1 Features of hologram-based obfuscation (Sengupta and Rathor, 2019)
  • 8.4.2 Threat model
  • 8.4.3 Overview
  • 8.4.4 Details of hologram-based obfuscation
  • 8.5 Illustrative examples of hologram-based obfuscation for DSP cores
  • 8.5.1 Case study of IIR-FIR filter obfuscated design
  • 8.5.2 Case study of 4-point DCT-IDCT obfuscated design
  • 8.6 Determination of gate count affected due to hologram-based obfuscation of DSP cores
  • 8.7 Structural obfuscation of DSP cores (circuits) using high-level transformation (Sengupta et al., 2017a)
  • 8.7.1 Example 1: 4-point DCT
  • 8.7.2 Example 2: 8-point DCT
  • 8.7.3 Example 3: 8-point IDCT
  • 8.7.4 Example 4: FIR filter
  • 8.7.5 Example 5: IIR filter
  • 8.7.6 Example 6: 4-point IDCT
  • 8.8 Design of non-obfuscated (baseline versions) DSP circuits
  • 8.8.1 Example 1: 4-point DCT (Sengupta and Mohanty, 2019)
  • 8.8.2 Example 2: 4-point IDCT
  • 8.8.3 Example 3: 4-point DIT-FFT
  • 8.8.4 Example 4: 8-point DIT-FFT
  • 8.8.5 Example 5: 8-point DCT
  • 8.8.6 Example 6: 8-point IDCT
  • 8.8.7 Example 7: FIR filter
  • 8.8.8 Example 8: IIR filter
  • 8.9 Analyses of case studies
  • 8.9.1 Strength of obfuscation analysis
  • 8.9.2 Design area analysis
  • 8.9.3 Design delay analysis
  • 8.10 Conclusion
  • 8.11 Questions and exercises
  • References

Inspec keywords: high level synthesis; holography; digital signal processing chips; security of data

Other keywords: high-level synthesis; un-obfuscated DSP circuits; DSP cores; hologram-based obfuscation methodology; security hologram; system-on-chip design process; structurally obfuscated digital signal processing; hologram-based structural obfuscation; IP cores; structural-obfuscation techniques; high-level transformation-based obfuscated DSP circuits

Subjects: Electronic engineering computing; Semiconductor integrated circuits; Digital signal processing; Holography; Data security

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