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Intuition Table for four at 8 o’clock. Name of Mr. Smith. Please solve this puzzle. O.K., O.K. Mr. Smith Restauranteur
Intuition Suppose: ◆ A puzzle takes an hour to solve ◆ There are 40 tables in restaurant ◆ Reserve at most one day in advance A legitimate patron can easily reserve a table, but:
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: Our solution: client puzzles
Page 17 and 18: The client puzzle protocol Client S
Page 19 and 20: What does a puzzle look like
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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