A blockchain system user identity anonymous, traceable method and corresponding storage medium and electronic device

A system user and user identity technology, which is applied in the field of blockchain system user identity anonymity, traceable methods and corresponding storage media and electronic devices, can solve problems such as not considering user identity supervision, low proof efficiency, and complex implementation. To achieve the effect of traceability

Inactive Publication Date: 2020-11-03
INST OF INFORMATION ENG CHINESE ACAD OF SCI
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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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  • A blockchain system user identity anonymous, traceable method and corresponding storage medium and electronic device
  • A blockchain system user identity anonymous, traceable method and corresponding storage medium and electronic device
  • A blockchain system user identity anonymous, traceable method and 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 traceable method and corresponding storage media and electronic devices, which are suitable for a block chain network composed of several other client terminals and a supervision center. The steps include: passing through the supervision center Obtain a first certificate; obtain a second certificate according to the first certificate and the first identification, and randomize and anonymize the second certificate to obtain an anonymous certificate; sequentially generate a public-private key pair and a Binding information, and after the binding information is confirmed on the block chain, a transaction consisting of the public key, transaction information and the anonymous certificate is uploaded to the block chain. The second certificate of the present invention is randomized every time, the first identification is kept secret, and the anonymous certificate does not reveal any information about the identity of the user. The user of the present invention registers with the supervision center to obtain a certificate, and the user must attach a corresponding certificate every time a transaction is sent, thereby realizing 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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Patent Type & Authority Patents(China)
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 CHINESE ACAD OF SCI
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