基于联盟链的云存储完整性审计机制研究

Research on cloud storage integrity auditing mechanism based on consortium blockchains

针对云存储完整性审计公正性问题,提出一种基于联盟区块链的云存储完整性审计模型(CSACB,Cloud Storage Integrity Auditing Model Based on Consortium Blockchains).首先,该模型以树型结构描述审计联盟(AC,Audit Consortium)构成,同时利用层级证书链(LCC,Layer Certificate Chain)对联盟成员进行身份标识和权限控制.其次,采用完整性审计链与动态操作链的双链形式支持可变云存储审计.最后,利用智能合约(SC,Smart Contract)并结合数据块标签索引机制构建公正的动态操作审计模型,理论分析和实验结果表明该模型在安全性和性能上具备明显优势.

Aiming at the issue of fairness in cloud storage integrity audit,a Cloud Storage Integrity Auditing Model Based on Consortium Blockchains(CSACB)is proposed.First of all,the model describes the composition of audit consortium(AC)by a tree structure,and uses the layer certificate chain(LCC)to identify and control the members of the alliance.Second,variable cloud storage auditing is supported by a two-chain form of integrity auditing chain and dynamic operating chain.Finally,the fair dynamic operation audit model is constructed by using the smart contract(SC)and the data block label index mechanism,and the results of theoretical analysis and experimental show that the model has obvious advantages in terms of security and performance.