On Cryptographic Chained Puzzles

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Provided by: Politecnico di Torino
Topic: Security
Format: PDF
Cryptographic puzzles provide an elegant solution in combating denial of services attacks. In this paper, the authors introduce the concept of chained puzzles and they define two kinds of chained puzzles: linearly chained puzzles and randomly chained puzzles. These construnstions prove to be very useful in some scenarios, from which the more general is in which a client may choose to solve only some of the puzzles that were sent by the server and gain resources from a server according to the amount of puzzles that he solved.
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