A Method of Identity Privacy Protection in Consortium Blockchain Based on Traceable Ring Signature
As a branch of blockchain that is widely used at present,consortium blockchain has stronger privacy than the public chain in blockchain,but there are still some de-anonymization methods that can reveal the identity privacy of users in consortium blockchain.In order to protect the identity privacy of users in consortium blockchain and increase the robustness of system,we propose a consortium blockchain identity privacy protection method combining traceable ring signature and practical byzantine fault tolerance.Its core idea is to make the identity of users in the consortium blockchain conditional anonymity through traceable ring signature,and conditional anonymity refers to that the user is anonymous under certain conditions,that is,the user is anonymous during normal transactions.When a transaction dispute occurs between users,the identity of the transaction related users can also be de-anonymization.In addition,combining traceable ring signature with practical byzantine fault tolerance,the task of de-anonymization is completed by the nodes in the consortium blockchain through practical byzantine fault tolerant,which reduces the power and responsibility of the central authority of the consortium blockchain,not only makes the user anonymous to the central authority,but also ensures that the system can operate normally when the central authority fails.Through experimental analysis and comparison,the proposed scheme can protect user identity privacy and ensure high security and fault tolerance within a reasonable computational cost.
blockchainconsortium blockchainidentity privacytraceable ring signaturepractical byzantine fault tolerance
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