Raccoon Attack - Finding and Exploiting Most-Significant-Bit-Oracles in TLS-DH(E)

Raccoon Attack - Finding and Exploiting Most-Significant-Bit-Oracles in TLS-DH(E)

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Intro

1 of 26

1 of 26

Intro

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Raccoon Attack - Finding and Exploiting Most-Significant-Bit-Oracles in TLS-DH(E)

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  1. 1 Intro
  2. 2 TLS-DH(E)
  3. 3 Constant Time Execution
  4. 4 Attack Overview
  5. 5 Retrieving the PMS
  6. 6 Key Derivation in TLS
  7. 7 Merkle-Damgård-Construction
  8. 8 Hashfunction Performance (expectation)
  9. 9 SSL 3 Key Derivation
  10. 10 TLS 1.0/1.1 PRF
  11. 11 HMAC in the PRF
  12. 12 Attacker can choose Hash Functions
  13. 13 Measurement Errors
  14. 14 Special Timing Measurement Equipment
  15. 15 Direct Raccoon + Non-Determinism
  16. 16 Impact
  17. 17 Countermeasure
  18. 18 So.... no Side-Channel?
  19. 19 Raccoon and ECDH(E)
  20. 20 Raccoon and TLS 1.3
  21. 21 Raccoon and eTLS/ETS
  22. 22 Why the mess?
  23. 23 Raccoon & DH(E) Proofs
  24. 24 PRF-ODH Assumption
  25. 25 Raccoon and other Protocols
  26. 26 Conclusion

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