Title: Identity-based threshold ring signcryption from pairing

Authors: Lunzhi Deng; Siwei Li; Yafeng Yu

Addresses: School of Mathematics and Computer Science, Guizhou Normal University, Guiyang 550001, China ' Graduate School, Guizhou Normal University, Guiyang 550001, China ' School of Mathematics and Computer Science, Guizhou Normal University, Guiyang 550001, China

Abstract: This paper presents an identity-based threshold ring signcryption scheme. With this technique, any group of t entities can choose n - t entities to generate a t-out-of-n signcryption on behalf of the group of n members, yet the actual signcrypters remain anonymous. The scheme is proven to be indistinguishable against adaptive chosen ciphertext attacks, existentially unforgeable against adaptive chosen message and identity attacks, and unconditional signcrypter ambiguity under the random oracle model. To the best of authors' knowledge, the scheme is the first security ID-based threshold ring signcryption scheme.

Keywords: identity-based cryptography; signcryption; pairings; security; threshold ring signature; ciphertext attacks; adaptive chosen message; identity attacks; random oracle model.

DOI: 10.1504/IJESDF.2014.063093

International Journal of Electronic Security and Digital Forensics, 2014 Vol.6 No.2, pp.90 - 103

Received: 16 Sep 2013
Accepted: 22 Oct 2013
Published online: 30 Jul 2014 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article