Block chain system user identity anonymity and traceability method, corresponding storage medium and electronic device

A system user and user identity technology, applied in user identity/authority verification, transmission system, digital transmission system, etc., can solve the problems of not considering user identity supervision, low proof efficiency, complex implementation, etc., and achieve traceability Effect

Inactive Publication Date: 2020-04-24
INST OF INFORMATION ENG CAS
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Problems solved by technology

This method provides good privacy protection, but at present, the implementation of the proof is relatively complicated, and the efficiency of generating proof is low, which is still a l

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  • Block chain system user identity anonymity and traceability method, corresponding storage medium and electronic device
  • Block chain system user identity anonymity and traceability method, corresponding storage medium and electronic device
  • Block chain system user identity anonymity and traceability method, corresponding storage medium and electronic device

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[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the following will further illustrate the structure of the present invention through specific embodiments and drawings.

[0035] The present invention adopts the following technical solutions:

[0036] 1) Generation of certificates

[0037] The idea of ​​certified signature in the paper "Fully Anonymous Group Signatures Without Random Oracles" written by Groth in 2007 is used to generate user certificates. Its verifiable signature scheme contains 4 algorithms (create, register, sign, verify). Among them, the present invention only uses the certificate generation part of the scheme, namely creation and registration.

[0038] A) Create algorithm Setup(1 k ):

[0039] The central Issuer produces the bilinear group gk:=(p,G,G T ,e,g)←G(1 k )., where G is the bilinear group generation algorithm, k is the system safety parameter, p is a large prime number, G...

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Abstract

The invention discloses a block chain system user identity anonymity and traceability method, a corresponding storage medium and an electronic device. The method are suitable for a block chain networkcomposed of a plurality of other user sides and a supervision center, and the method comprises the following steps: obtaining a first certificate through the supervision center; obtaining a second certificate according to the first certificate and the first identifier, and randomizing and anonymizing the second certificate to obtain an anonymous certificate; sequentially generating a public and private key pair and binding information, and uploading a transaction composed of a public key, transaction information and the anonymous certificate to the block chain after the binding information isconfirmed on the block chain. The second certificate is randomized each time, the first identifier is secret, and the anonymous certificate does not leak any information related to the identity of the user. According to the invention, the user registers at the supervision center to obtain the certificate, and the user needs to attach the corresponding certificate every time the user sends a transaction, thereby achieving the traceability of the user.

Description

technical field [0001] The invention belongs to the technical field of information security, and in particular relates to a block chain system user identity anonymization and traceability method, corresponding storage medium and electronic device. Background technique [0002] At present, there is no unified definition of blockchain. It is generally believed that blockchain is a distributed public database, which has the characteristics of anti-counterfeiting, tamper-proof, traceable transactions, and trustlessness. The many advantages of the blockchain have attracted many companies to develop applications based on the blockchain. Blockchain technology is currently mainly used in the financial field, and has some initial applications in the insurance industry, logistics, copyright protection and other fields. [0003] So far, Bitcoin is still the most typical application of the blockchain. In the Bitcoin system, a large number of users freely generate transaction addresses ...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L9/32
CPCH04L63/0421H04L9/3263H04L9/3221H04L9/3268H04L2209/42H04L9/50
Inventor 李佩丽徐海霞
Owner INST OF INFORMATION ENG CAS
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