[Resource Topic] 2008/254: An Efficient Identity-based Ring Signcryption Scheme

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Title:
An Efficient Identity-based Ring Signcryption Scheme

Authors: Zhenchao ZHU, Yuqing ZHANG, Fengjiao WANG

Abstract:

ID-based ring signcryption schemes (IDRSC) are usually derived from bilinear parings, a powerful but computationally expensive primitive. The number of paring computations of all existing ID-based ring signcryption schemes from bilinear pairings grows linearly with the group size, which makes the efficiency of ID-based schemes over traditional schemes questionable. In this paper, we present a new identity-based ring signcryption scheme, which only takes four pairing operations for any group size and the scheme is proven to be indistinguishable against adaptive chosen ciphertext ring attacks (IND-IDRSC-CCA2) and secure against an existential forgery for adaptive chosen messages attacks (EF-IDRSC-ACMA).

ePrint: https://eprint.iacr.org/2008/254

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