Efficient identity-based ring identification scheme and identity-based ring signature scheme on lattices
by Xiaohui Hu; Huiwen Jia; Jingang Liu; Zhiqi Zhao
International Journal of Security and Networks (IJSN), Vol. 18, No. 4, 2023

Abstract: Identity-based cryptography (IBC) can be applied to scenarios that involve a large number of public keys in each execution. In this paper, we propose an efficient identity-based ring signature scheme on lattices with signature size logarithmic to the cardinality of the ring. To this end, we first construct an efficient identity-based ring identification scheme by combining preimage sampling algorithms and a zero-knowledge proof system for a tree-based accumulator. Then we apply the Fiat-Shamir transformation and obtain a secure identity-based ring signature scheme. We prove its security in the random oracle model under the small integer solution assumption.

Online publication date: Fri, 15-Dec-2023

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