Alliance chain cross-chain privacy protection method based on group signature and CA multi-party authentication

A privacy protection and group signature technology, applied in the blockchain field, can solve problems such as difficult traceability, non-reproducibility, and unsaved data, and achieve the effect of satisfying audit and tracing behaviors, satisfying privacy and security, and solving problems that cannot be played back

Active Publication Date: 2021-03-02
ZHEJIANG UNIV
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Problems solved by technology

However, the process of issuing certificates by this mechanism cannot be reproduced, and it is extremely difficult to trace the process in the later stage; and the distributed data is not saved, and it is difficult to obtain evidence
At the same time, the cross-chain transactions published in the traditional alliance chain are directly signed by the two parties to the transaction. Any member in the all

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  • Alliance chain cross-chain privacy protection method based on group signature and CA multi-party authentication
  • Alliance chain cross-chain privacy protection method based on group signature and CA multi-party authentication
  • Alliance chain cross-chain privacy protection method based on group signature and CA multi-party authentication

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Embodiment Construction

[0032] The purpose and effect of the present invention will become more obvious by describing the present invention in detail according to the accompanying drawings and specific embodiments.

[0033] The hierarchical structure of the alliance chain digital certificate is as follows: figure 1 As shown, the present invention is based on a group signature and CA multi-party authentication method for cross-chain privacy protection of the alliance chain, including the following steps:

[0034] 1) Root certificate generation: when a consortium chain is created, each member in the consortium chain specifies a node as a certificate authority (Certificate Authority, CA) node through a configuration file, and a third-party organization (Root Certificate Authority) trusted by each member Certificate Authority, RTCA for short) generates the root digital certificate (RootCertificate, RTCERT for short) of the entire alliance chain. The RTCA agency issues the sub-root certificate of the RTC...

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Abstract

The invention discloses an alliance chain cross-chain privacy protection method based on group signature and CA multi-party authentication. In the alliance chain, full-life-cycle supervision in the chain and privacy protection of cross-chain transactions of the alliance chain are achieved through a technical system integrating certificate distribution uplink and group signature encryption. According to the invention, the certificate blockchain is introduced, and the CA of the alliance chain maintains the certificate blockchain and packages the operation and content of the distributed certificates into a transaction uplink, thereby achieving the later tracing and evidence obtaining of the alliance chain. A group signature technology is introduced, a node of an alliance chain uses a group public key to encrypt a cross-chain transaction to achieve identity privacy protection of the transaction, and an administrator uses a group private key to obtain a signer of the cross-chain transactionto achieve supervision. Generation of a digital certificate and a group public and private key and signature and verification of transaction information are achieved by integrally adopting a currentinternationally universal asymmetric encryption algorithm or an over-encryption algorithm, so that overall data privacy protection of the alliance chain is ensured.

Description

technical field [0001] The invention belongs to the technical field of block chains, and in particular relates to a method for protecting alliance chain cross-chain privacy based on group signature and CA multi-party authentication. Background technique [0002] Blockchain technology, blockchain is a chained data structure that combines data blocks in a sequential manner in chronological order, involving many scientific and technological issues such as mathematics, cryptography, the Internet, and computer programming. The integrated application of distributed data storage, point-to-point transmission, consensus mechanism, asymmetric encryption algorithm, smart contract and other technologies, in order to realize the characteristics of traceability, sharing and non-tampering in blockchain technology. [0003] The consortium chain is a special scenario application of the blockchain implemented by using blockchain technology. It has a certain access mechanism for nodes that wan...

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Application Information

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IPC IPC(8): G06Q20/38G06Q20/40G06F21/60G06F21/62G06F21/64
CPCG06Q20/38215G06Q20/3825G06Q20/3829G06Q20/4014G06F21/602G06F21/6245G06F21/64
Inventor 梁秀波彭浩洲尹可挺张瑞元赵昱吴俊涵
Owner ZHEJIANG UNIV
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