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Smart Card Security: Power Analysis Attacks - PowerPoint PPT Presentation


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Smart Card Security: Power Analysis Attacks Greg Kish Rob Rex Jamie Walls Overview Introduction Background What is a Smart Card Evolution Attacks Power Analysis Conclusion Background What is a ‘smart card’? vs. dumb cards Why smart cards? Applications Physical Characteristics

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Presentation Transcript
overview
Overview
  • Introduction
  • Background
    • What is a Smart Card
    • Evolution
    • Attacks
  • Power Analysis
  • Conclusion
background
Background
  • What is a ‘smart card’?
    • vs. dumb cards
    • Why smart cards?
  • Applications
  • Physical Characteristics
    • At a glance
    • ISO 7816-2:1988
evolution
Evolution
  • Embossed numbers and cardholder’s name
  • Signature field
  • Magnetic stripe
  • Hologram
  • Internet fraud
  • Smart card
attacks
Attacks
  • Invasive
    • Physically breaking the card
  • Non-Invasive
    • Glitching
    • Malicious applets
    • Power analysis
simple power analysis
Simple Power Analysis
  • Gathering the data
    • How?
    • What does it mean?
      • Hamming weight leakage
      • Transition count
  • Breaking DES
simple power analysis8
Simple Power Analysis
  • Gathering the data
    • How?
    • What does it mean?
      • Hamming weight leakage
      • Transition count
  • Breaking DES
differential power analysis
Differential Power Analysis
  • Why not keep it simple?
  • How its done
    • Attack in pieces
    • Only 26 choices per Sbox
noise
Noise
  • Noise
    • 4 types of noise
      • External
      • Intrinsic
      • Quantizational
      • Algorithmic
defenses
Defenses
  • Ineffective
    • Add Noise
    • Change execution order
  • Promising advances
    • Random calculations
    • Hardware research
conclusion
Conclusion
  • This is important!
    • Smart cards are convenient & powerful
    • Limited by their safety
  • Power Analysis
    • Information can only be hidden