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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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AI Technical Summary

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 long way from the actual application.
[0008] The above three types of technologies focus on the research of privacy protection issues, but do not consider the supervision of user identities

Method used

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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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Embodiment Construction

[0034] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the structure of this invention will be further described below through specific embodiments and accompanying drawings.

[0035] The present invention takes following technical scheme:

[0036] 1) Generation of certificate

[0037] The idea of ​​a certified signature in Groth's 2007 paper "Fully Anonymous Group Signatures Without Random Oracles" is used to generate the user's certificate. Its certifiable signature scheme contains 4 algorithms (create, register, sign, verify). Wherein, the present invention only uses the certificate generation part of the scheme, that is, creation and registration.

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

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

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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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