Lightweight multi-copy data cloud auditing method and device supporting justice

Abstract

The invention provides a lightweight multi-copy data cloud auditing method and device supporting justice. The lightweight multi-copy data cloud auditing method comprises the steps of constructing a first Merkel hash tree according to hash values of data block tags generated by a user side based on data blocks of a to-be-audited file; and generating data integrity evidence information through the first Merkel hash tree according to challenge information obtained from a third-party auditing end, and sending the data integrity evidence information to the third-party auditing end so as to allow the third-party auditing end to verify the data integrity evidence information, wherein the data integrity evidence information comprises label evidence and a data block evidence set. Compared with an existing cloud auditing scheme, a data block mask label is adopted to replace a data block mask, so the risk that the data block mask is leaked is avoided; and the Merkel hash tree is adopted to authenticate the data block label, so it is ensured that the data block label cannot be forged, and the calculation complexity of the data block label is simplified.

Description

technical field [0001] This application belongs to the technical field of information security, and in particular, relates to a lightweight multi-copy data cloud audit method and device supporting fairness. Background technique [0002] With the rapid development of cloud computing, cloud storage service, as one of the core services of cloud computing, has also been applied in many fields. At present, more and more individuals, organizations, and even commercial companies tend to store and share their data on the cloud to facilitate data sharing, improve the reliability of data storage, and reduce the cost of local storage and maintenance. However, the user's data is stored on the cloud server, and the local computer no longer stores the data. While this brings convenience to users, it also makes them lose physical control over the data, which means that the ownership and management of user data are separated. Therefore, the user cannot apply the traditional method to veri...

AI Technical Summary

Problems solved by technology

[0003] This application provides a lightweight multi-copy data cloud audit method and device that supports fairness, so as to at least solve the waste of computing resources and the sharing of computing resources caused by the need to generate corresponding label sets for all copy files in the existing multi-copy cloud audit solution. The problem that the data block mask is easy to leak

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