An attribute-based cloud data audit method and system

Abstract

The invention relates to the technical field of network security, and specifically relates to a cloud data auditing method and system based on attributes. The method provided by the invention comprises the following steps: the system is initialized, and a public key of the system is generated; a client uploads an attribute set, and a key generation center generates a private key for a user; and the client uploads a data block and an authenticator to a cloud server. An auditing server sends a challenge value and an auditing attribute set to the cloud server, the cloud server firstly verifies the validity of the auditing attribute set, then calculates a response value by using the challenge value, the data block of the user and the authenticator, and transmits the response value to the auditing server, and the auditing server verifies whether the response value passes the verification so as to check whether the data of the user are completely stored on the cloud server. By adoption of the cloud data auditing method and system based on attributes provided by the invention, the complex key management burden in the traditional auditing method can not only be simplified, and the user attribute privacy protection is also provided, so that the auditing server cannot deduce all attributes used by the user for uploading the data in an auditing process, and thus the method is more practical.

Description

technical field [0001] The invention belongs to the technical field of network security, and in particular relates to an attribute-based cloud data audit method and system. Background technique [0002] As the most basic type of "Facility-as-a-Service IaaS" model in cloud computing, cloud storage enables data owners to store their data in the cloud and delete the backup stored locally, which greatly reduces the user's need for local data. storage and management burden. And when users need to retrieve data, they only need to access the cloud through mobile terminals such as mobile phones and tablet computers, and download the part of the data they need. Cloud storage services have many significant advantages: access anytime and anywhere, location-independent, on-demand services, elastic resources, etc. However, in addition to the above-mentioned advantages, cloud storage services also have some security issues and challenges. When users choose to outsource their data to cl...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the security problem of cloud storage service, the present invention provides an attribute-based cloud data audit method and system

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