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Forensic detective control using a digital signature-based watermark for IP core protection

Forensic detective control using a digital signature-based watermark for IP core protection

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This chapter discusses forensic detective control using a digital signature-based watermark for intellectual property (IP) cores or integrated circuits (ICs). The chapter provides detailed insight on digital-signature generation and the embedding process that includes a discussion on signature-generation rules and algorithms, IP core protection using forensic detective control, methodology of implanting digital signature -based watermark constraints covertly into an IP core design and its respective design process.

Chapter Contents:

  • 3.1 Introduction
  • 3.2 Threat models of an IP core
  • 3.3 Selected contemporary approaches
  • 3.3.1 Prior work on IP core protection using watermarking
  • 3.3.2 Limitations of contemporary hardware watermarking approaches and advantages of digital signature-based watermarking
  • 3.4 Security modules employed in digital signature-based watermarks
  • 3.4.1 Crypto-hash function-SHA-512
  • 3.4.2 Crypto-encryption function - RSA
  • 3.5 Forensic detective control using a digital signature-based watermark
  • 3.5.1 Digital signature framework
  • 3.5.1.1 Equivalent bitstream generation of an IP core
  • 3.5.1.2 Hash-digest generation
  • 3.5.1.3 Conversion of hash digest into RSA compatible input
  • 3.5.1.4 RSA encryption of hash-bitstream
  • 3.5.1.5 Formation of digital signature representing a vendor watermark
  • 3.5.1.6 Digital signature encoding
  • 3.5.1.7 Digital signature embedding process
  • 3.5.2 Detection process of digital signature-based watermarks
  • 3.5.2.1 Signature-constraints' generation and mapping of storage variables to a register
  • 3.5.2.2 Signature inspection
  • 3.5.2.3 Signature verification
  • 3.6 Case study on 8-point DCT used in image compression
  • 3.6.1 Digital signature generation corresponding to an 8-point DCT core
  • 3.6.2 Embedding of digital signature as watermark into the 8-point DCT core
  • 3.7 Desirable properties of a digital signature-based watermark
  • 3.7.1 High resiliency
  • 3.7.2 Strong tamper tolerance
  • 3.7.3 Low design overheads
  • 3.7.4 Correct functionality
  • 3.7.5 Low-signature embedding and detection time
  • 3.8 Threat scenarios and their countermeasures using digital signature-based watermarks
  • 3.8.1 Unauthorized signature-constraints insertion
  • 3.8.2 Original signature tampering
  • 3.8.3 Unintended signature-constraints extraction
  • 3.9 Analysis based on case studies
  • 3.9.1 Security analysis
  • 3.9.2 Design cost analysis
  • 3.10 Conclusion
  • 3.11 Questions and exercises
  • References

Inspec keywords: digital signatures; watermarking; industrial property; digital forensics; microprocessor chips

Other keywords: IP core design; integrated circuits; IP core protection; intellectual property cores; forensic detective control; embedding process; digital-signature generation; respective design process; digital signature-based watermark

Subjects: Microprocessors and microcomputers; Microprocessor chips; Cryptography

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