University of Wollongong Research Online Faculty of Engineering and Information Faculty of Engineering and Information Sciences - Papers: Part A Sciences 1-1-2015 Secure delegation of signing power from factorization Yong Yu University of Wollongong,
[email protected] Man Ho Au University of Wollongong,
[email protected] Yi Mu University of Wollongong,
[email protected] Willy Susilo University of Wollongong,
[email protected] Huai Wu University of Electronic Science and Technology of China,
[email protected] Follow this and additional works at: https://ro.uow.edu.au/eispapers Part of the Engineering Commons, and the Science and Technology Studies Commons Recommended Citation Yu, Yong; Au, Man Ho; Mu, Yi; Susilo, Willy; and Wu, Huai, "Secure delegation of signing power from factorization" (2015). Faculty of Engineering and Information Sciences - Papers: Part A. 5030. https://ro.uow.edu.au/eispapers/5030 Research Online is the open access institutional repository for the University of Wollongong. For further information contact the UOW Library:
[email protected] Secure delegation of signing power from factorization Abstract Delegation of signing is a working way common in oce automation work, and is also an important approach to establish trust. Proxy signature is an important cryptographic primitive for delegating the signing powers and it has found many real world applications. The existing proxy signature schemes from factorization assumption are either insecure or inecient. In this paper, we propose a novel, ecient and provably secure proxy signature scheme from factorization. Our construction makes use of a factorization based key-exposure free chameleon hash function in the delegation phase and the proxy signer needs only to nd a collision to a chameleon hash value to generate a valid proxy signature.