A novel privacy protection of permissioned blockchains with conditionally anonymous ring signature

【Author】 Zhang, Xuewang; Ye, Caijin

【Source】CLUSTER COMPUTING-THE JOURNAL OF NETWORKS SOFTWARE TOOLS AND APPLICATIONS

【影响因子】2.303

【Abstract】With the rapid development of permissioned blockchains, the problem of privacy leakage within permissioned blockchains is increasingly serious. In this paper, for the privacy problem in permissioned blockchains, a novel privacy protection method has been put forward. In this novel method, the ring signature is used to protect the privacy of the user in permissioned blockchains. On the other hand, the unconditional anonymity of ring signature may be abused maliciously by the adversary. Conditional anonymity is considered to improve the ring signature. Therefore, based on conditionally anonymous ring signature, permissioned blockchains privacy protection scheme has also been laid down. Furthermore, the effects of smart contract for transaction flows are considered. The asynchronous signing transaction process is proposed. The security of the scheme has been formally reduced to the Discrete Logarithm assumption. The comparison with the state-of-the-art and simulation experiment have also demonstrated that the proposed scheme is efficient and practical.

【Keywords】Privacy protection; Conditional anonymity; Ring signature; Permissioned blockchains

【发表时间】

【收录时间】2022-01-19

【文献类型】期刊

【主题类别】

区块链技术--