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Anonymous identity management and verification method supporting dynamic change of user attributes

A technology of dynamic change and identity management, applied in the field of blockchain, it can solve the problems of unforgeability and the inability to obtain the real identity of users, so as to achieve the effect of identity management and verification, preventing collusion attacks and protecting privacy.

Pending Publication Date: 2021-11-16
INST OF INFORMATION ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

During the signature verification process, any third party cannot obtain the real identity of the user from the message and the signature of the message
[0021] (3) Unforgeability
At present, there is no existing method or system that can solve the above problems in the alliance chain, so further research is needed

Method used

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  • Anonymous identity management and verification method supporting dynamic change of user attributes
  • Anonymous identity management and verification method supporting dynamic change of user attributes
  • Anonymous identity management and verification method supporting dynamic change of user attributes

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Embodiment Construction

[0070] In order to make the technical solution of the present invention more comprehensible, specific embodiments and accompanying drawings are described in detail as follows.

[0071] This embodiment proposes a distributed and traceable anonymous authentication method suitable for alliance chains, which is applied to blockchain network systems, such as figure 1 As shown, the system includes users, attribute institutions and blockchain service providers. Property authorities are responsible for maintaining their property sets, generating property keys and public keys, and generating property signing keys for users. Different agencies are responsible for different attributes. Users are given corresponding attributes, there may be one or more. Through the management and verification of these attributes, the user identity management and verification are realized. Blockchain service providers provide an open platform for transactions between users. All transaction information ...

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Abstract

The invention discloses an anonymous identity management and verification method supporting dynamic change of user attributes, which belongs to the field of block chains and mainly comprises four steps of system initialization, generation and updating of an attribute signature key, signature generation and signature verification. According to the method, the problems in the prior art can be effectively solved, management and verification of the user identity can be realized under the condition that the user identity is not leaked, and the process does not depend on a central trust mechanism, so that the method is well suitable for a distributed scene.

Description

technical field [0001] The invention relates to an anonymous identity management and verification method that supports dynamic changes of user attributes, and belongs to the field of block chains. Background technique [0002] In recent years, blockchain technology has become a hot research topic. Blockchain refers to a technical solution for collectively maintaining a reliable database through decentralization and trustlessness. This technical solution allows any number of nodes participating in the system to calculate and record all the information exchange data in the system for a period of time into a data block (block) through cryptographic algorithms, and generate the fingerprint of the data block for linking ( chain) next data block and verification, all participating nodes of the system will jointly determine whether the record is true. [0003] The four main properties of blockchain are: [0004] (1) Decentralized. There is no centralized hardware or management ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/62G06F21/31G06F21/46
CPCG06F21/6218G06F21/31G06F21/46
Inventor 苏倩倩章睿薛锐孙优
Owner INST OF INFORMATION ENG CHINESE ACAD OF SCI
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