A New Framework for Conditionally Anonymous Ring Signature

作者：Zeng, Shengke^*; Jiang, Shaoquan

来源：Computer Journal, 2014, 57(4): 567-578.

DOI：10.1093/comjnl/bxt036

• ring signature
• non-interactive zero-knowledge proofs
• pseudorandom functions

Conditionally anonymous ring signatures are a variant of ring signatures such that the anonymity is conditional: if a user is the true signer, then he can claim this through a confirmation protocol; if he is not the signer, he can prove this through a disavowal protocol. Hence, this can preserve the anonymity of a signer while reserving the right to trace it when necessary. The security of such a signature also requires that an innocent non-signer will not be framed as a signer. In this paper, we propose a new framework for this type of signature without random oracles. Our construction can be realized under general complexity assumptions and has a simple structure. In contrast, previous works are based on non-standard assumptions or proved secure in the random oracle model.

• 出版日期2014-4
• 单位绵阳师范学院; 电子科技大学