Cryptology ePrint Archive: Report 2003/023
New identity based signcryption schemes from pairings
Benoît Libert and Jean-Jacques Quisquater
Abstract: We present a new identity based scheme based on pairings
over elliptic curves. It combines the functionalities of
signature and encryption and is provably secure in the random
oracle model. We compare it with Malone-Lee's one from security
and efficiency points of view. We give a formal proof of
semantical security under the Decisional Bilinear Diffie-Hellman
assumption for this new scheme and we show how to devise other
provably secure schemes that produce even shorter ciphertexts.
Category / Keywords: Public key cryptography/ Identity based cryptosystems, pairings, signcryption schemes
Publication Info: accepted at IEEE ITW 2003
Date: received 4 Feb 2003, last revised 24 Feb 2003
Contact author: libert at dice ucl ac be
Available format(s): Postscript (PS) | Compressed Postscript (PS.GZ) | PDF | BibTeX Citation
Note: The security proofs contained in this paper have been somewhat corrected
Version: 20030224:102601 (All versions of this report)
Short URL: ia.cr/2003/023
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