Design and implementation of network puzzles

  title={Design and implementation of network puzzles},
  author={Wu-chi Feng and Edward C. Kaiser and A. Luu},
  journal={Proceedings IEEE 24th Annual Joint Conference of the IEEE Computer and Communications Societies.},
  pages={2372-2382 vol. 4}
Client puzzles have been proposed in a number of protocols as a mechanism for mitigating the effects of distributed denial of service (DDoS) attacks. In order to provide protection against simultaneous attacks across a wide range of applications and protocols, however, such puzzles must be placed at a layer common to all of them; the network layer. Placing puzzles at the IP layer fundamentally changes the service paradigm of the Internet, allowing any device within the network to push load back… CONTINUE READING
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