NDLI: The dual receiver cryptosystem and its applications

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The dual receiver cryptosystem and its applications

Content Provider	ACM Digital Library
Author	Keromytis, Angelos D. Diament, Theodore Yung, Moti Lee, Homin K.
Abstract	We put forth the notion of a dual receiver cryptosystem and implement it based on bilinear pairings over certain elliptic curve groups. The cryptosystem is simple and efficient yet powerful, as it solves two problems of practical importance whose solutions have proven to be elusive before:(1) A provably secure "combined" public-key cryptosystem (with a single secret key per user in space-limited environment) where the key is used for both decryption and signing and where encryption can be escrowed and recovered, while the signature capability never leaves its owner. This is an open problem proposed by the work of Haber and Pinkas. (2) A puzzle is a method for rate-limiting remote users by forcing them to solve a computational task (the puzzle). Puzzles have been based on cryptographic challenges in the past, but the successful design of embedding a useful cryptographic task inside a puzzle, originally posed by Dwork and Naor, remained an open problem till today. We model and present "useful security puzzles" applicable in two scenarios: a secure fileserver, and an online transaction server (such as a webserver).
Starting Page	330
Ending Page	343
Page Count	14
File Format	PDF
ISBN	1581139616
DOI	10.1145/1030083.1030128
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2004-10-25
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Key escrow Elliptic curves Pairing-based cryptography Public key Digital signature Useful secure computation Puzzles
Content Type	Text
Resource Type	Article

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