Safe and efficient unlicensed blockchain condition anonymization method, system and application

Abstract

The invention belongs to the technical field of blockchain security, and discloses a safe and efficient unlicensed blockchain conditional anonymity method, system and application, and the safe and efficient unlicensed blockchain conditional anonymity method comprises: user one-time public and private key pair generation, anonymous transaction generation, transaction legality verification and user identity tracking; a one-time public key and related verification parameters are generated according to the long-term public key of the user; an anonymous transaction bill, a transaction signature and related verification parameters are generated by adopting a bilinear ring signature technology; the miner node and the supervision mechanism cooperatively verify the legality of the transaction, and respectively package the anonymous transaction and the user identity information into an anonymous unlicensed blockchain and a supervision blockchain; and the supervision mechanism tracks the anonymous identity of the user by using the private key of the supervision mechanism. Anonymity and traceability of the user identity in the unlicensed blockchain can be realized at the same time, introduction of an uncontrolled random number is avoided through the bilinear ring signature and the double-chain structure, and the throughput and the overall efficiency are improved.

Description

technical field [0001] The invention belongs to the technical field of blockchain security, and in particular relates to a safe and efficient method, system and application of non-permissioned blockchain conditional anonymity. Background technique [0002] The existing blockchain conditional anonymity scheme can effectively track the anonymous identity of users on the basis of privacy protection by introducing supervisory agencies with special information. When an honest node publishes a legal transaction, the transaction exists in the form of privacy protection. When special circumstances such as double spending and suspicious transaction content occur, the regulator can use the special information it has to track the anonymous identity of the transaction participants, thereby Achieving conditional anonymity of blockchain user identities. Since in real scenarios, criminals often prefer non-permissioned blockchains with a higher degree of anonymity to carry out illegal tran...

AI Technical Summary

Problems solved by technology

[0011] (1) There are a large number of uncontrolled random numbers that are easy to be used by the adversary in the conditional anonymity scheme in the existing non-permissioned blockchain scenario, causing security issues such as key leakage and concealed transmission

[0012] (2) The conditional anonymity scheme in the existing non-permissioned blockchain scenario uses a large number of complex cryptographic tools, resulting in unsatisfactory computational efficiency of the scheme

[0013] (3) The extra parameters introduced by the existing technology to ensure anonymity make the system throughput of the scheme low, and it is difficult to meet people's transaction needs

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