[Resource Topic] 2003/023: New identity based signcryption schemes from pairings

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New identity based signcryption schemes from pairings

Authors: Benoît Libert, Jean-Jacques Quisquater


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.

ePrint: https://eprint.iacr.org/2003/023

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