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Remarks ◆ Can use puzzles for any type of resource ◆ Only have to distribute puzzles when under attack ◆ Can scale hardness of puzzles depending on severity of attack
What does a puzzle look like
Page 1 and 2: Client Puzzles A Cryptographic Defe
Page 3 and 4: How to disable a restaurant Restaur
Page 5 and 6: Restauranteur Saboteur No More Tabl
Page 7 and 8: ◆ TCP SYN is a real-world problem
Page 9 and 10: IP Tracing (or Syncookies) Client S
Page 11 and 12: Connection timeout (for buffers) Se
Page 13 and 14: Our solution: client puzzles
Page 15 and 16: Intuition Suppose: ◆ A puzzle tak
Page 17: The client puzzle protocol Client S
Page 21 and 22: Puzzle construction Client Server S
Page 23 and 24: Puzzle properties ◆ Puzzles are s
Page 25 and 26: Some pros Avoids many flaws in othe
Page 27 and 28: Client puzzles seem most suitable f
Page 29 and 30: What’s in the paper ◆ Introduce
Page 31 and 32: More work on puzzles Puzzles have a
Page 33: Questions e-mail: ari@rsa.com

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