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Replay, Relay and Inverse-Sybil Attacks on Proximity Tracing Apps - PowerPoint PPT Presentation

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Replay, Relay and Inverse-Sybil Attacks on Proximity Tracing Apps Krzysztof Pietrzak 2020 Eurocrypt Rump Session, May 13th, Living Room Proximity Tracing . . . 8GD45AF3 8GD45AF3 . . . 8GD45AF3 Proximity Tracing . . . 8GD45AF3 8GD45AF3

  1. Replay, Relay and Inverse-Sybil Attacks on Proximity Tracing Apps Krzysztof Pietrzak 2020 Eurocrypt Rump Session, May 13th, Living Room

  2. Proximity Tracing . . . 8GD45AF3 8GD45AF3 . . . 8GD45AF3

  3. Proximity Tracing . . . 8GD45AF3 8GD45AF3 . . . . . . 8GD45AF3 . . . 8GD45AF3 . . . . . . 8GD45AF3 . . .

  4. Proximity Tracing . . . 8GD45AF3 8GD45AF3 . . . . . . 8GD45AF3 8GD45AF3 . . . 8GD45AF3 . . .

  5. Replay and Relay Attacks . . . 8GD45AF3 8GD45AF3 . . . . . . 8GD45AF3

  6. Replay and Relay Attacks . . . 8GD45AF3 8GD45AF3 . . . . . . 8GD45AF3 8GD45AF3

  7. Replay and Relay Attacks . . . 8GD45AF3 8GD45AF3 . . . . . . 8GD45AF3 8GD45AF3 8GD45AF3

  8. Replay and Relay Attacks . . . 8GD45AF3 8GD45AF3 . . . . . . 8GD45AF3 8GD45AF3 8GD45AF3

  9. Preventing Relay and Replay Attacks without Privacy ID, tag, C ID, K ID C tag = MAC K ( C )

  10. Preventing Relay and Replay Attacks without Privacy ID, tag, C ID, K ID C tag = MAC K ( C ) ID, K ID, K

  11. Preventing Relay and Replay Attacks without Privacy ID, tag, C ID, K ID C tag = MAC K ( C ) ID, tag, C ? = MAC K ( C ) tag ID, K ID, K

  12. Preventing Relay and Replay Attacks without Privacy ID, tag, C ID, K ID C tag = MAC K ( C ) ID, tag, C ? = MAC K ( C ) tag ID, K ID, K

  13. Preventing Relay and Replay Attacks without Privacy ID, tag, C ID, K ID C tag = MAC K ( C ) ID, tag, C ? = MAC K ( C ) tag ID, K ID, K

  14. Delayed Authentication (eprint 2020/418) ID, K ID, tag, σ ID, R tag = MAC K ( σ ) σ := commit ( C ; R ) σ := commit ( C ; R )

  15. Delayed Authentication (eprint 2020/418) ID, K ID, tag, σ ID, R tag = MAC K ( σ ) σ := commit ( C ; R ) σ := commit ( C ; R ) ID, tag, σ ? = MAC K ( σ ) tag ID, K ID, K

  16. Delayed Authentication (eprint 2020/418) ID, K ID, tag, σ ID, R tag = MAC K ( σ ) σ := commit ( C ; R ) σ := commit ( C ; R ) ID, tag, σ ? = MAC K ( σ ) tag ID, K ID, K

  17. Inverse Sybil Attacks 8GD45AF3 8GD45AF3 8GD45AF3

  18. Inverse Sybil Attacks 8GD45AF3 8GD45AF3 8GD45AF3

  19. Inverse Sybil Attacks https://github.com/DP-3T/documents/issues/295 8GD45AF3 8GD45AF3 8GD45AF3

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