Improved identity-based signcryption

Chen Liqun, John C Malone-Lee

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

252 Citations (Scopus)


Identity-based cryptography is form of public-key cryptography that does not require users to pre-compute key pairs and obtain certificates for their public keys. Instead, public keys can be arbitrary identifiers such as email addresses. This means that the corresponding private keys are derived, at any time, by a trusted private key generator. The idea of signcryption is to provide a method to encrypt and sign data together in a way that is more efficient than using an encryption scheme combined with a signature scheme. We present an identity-based signcryption solution that we believe is the most efficient, provably-secure scheme of its type proposed to date. Our scheme admits proofs of security in the random oracle model under the bilinear Diffie-Hellman assumption using the definitions proposed by Boyen.
Translated title of the contributionImproved identity-based signcryption
Original languageEnglish
Title of host publicationPublic Key Cryptography - PKC 2005
PublisherSpringer Berlin Heidelberg
Pages362 - 379
Number of pages17
ISBN (Print)3540244549
Publication statusPublished - Jan 2005

Publication series

NameLecture Notes in Computer Science

Bibliographical note

Conference Proceedings/Title of Journal: Public Key Cryptography (PKC 2005)


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