Smart Card Security: Power Analysis Attacks - PowerPoint PPT Presentation

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Smart Card Security: Power Analysis Attacks

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  1. Smart Card Security: Power Analysis Attacks Greg Kish Rob Rex Jamie Walls

  2. Overview • Introduction • Background • What is a Smart Card • Evolution • Attacks • Power Analysis • Conclusion

  3. Background • What is a ‘smart card’? • vs. dumb cards • Why smart cards? • Applications • Physical Characteristics • At a glance • ISO 7816-2:1988

  4. Evolution • Embossed numbers and cardholder’s name • Signature field • Magnetic stripe • Hologram • Internet fraud • Smart card

  5. Attacks • Invasive • Physically breaking the card • Non-Invasive • Glitching • Malicious applets • Power analysis

  6. Simple Power Analysis • Gathering the data • How? • What does it mean? • Hamming weight leakage • Transition count • Breaking DES

  7. Simple Power Analysis • Gathering the data • How? • What does it mean? • Hamming weight leakage • Transition count • Breaking DES

  8. Differential Power Analysis • Why not keep it simple? • How its done • Attack in pieces • Only 26 choices per Sbox

  9. Noise • Noise • 4 types of noise • External • Intrinsic • Quantizational • Algorithmic

  10. Defenses • Ineffective • Add Noise • Change execution order • Promising advances • Random calculations • Hardware research

  11. Conclusion • This is important! • Smart cards are convenient & powerful • Limited by their safety • Power Analysis • Information can only be hidden