Multiple users-based outsourcing database audit method

Abstract

The present invention discloses a multiple users-based outsourcing database audit method, aiming to solve problems of low signature verification efficiency and complex decryption in the prior art. The method comprises a first step that a data owner encrypts data by using a proxy re-encryption method so as to form a second-level ciphertext, generates a re-encryption secret key by inquiring a public key of a user, generates a searching label by using an Evdokimov encryption manner, and generates hash tree root signature by using aggregate signature; and the signature, second-level ciphertext, re-encryption secret key and the searching label are transmitted to a cloud server; a second step that the cloud server encrypts the second-level ciphertext so as to generate a first-level ciphertext; a third step that a user sends a search request to the cloud server, and the cloud server searches and returns a corresponding first-level ciphertext; and a fourth step that the user decrypts the first-level ciphertext so as to form a plaintext, and performs aggregate verification on the plaintext. Through adoption of the method, the burden on the data owner is greatly reduced, interaction is reduced for one time, data privacy protection is improved, and the method can be applied to safe data outsourcing in a cloud calculation environment.

Description

technical field [0001] The invention relates to the technical field of data processing, in particular to a multi-user outsourcing database audit method, which can be used for data security outsourcing in a cloud computing environment. Background technique [0002] With the continuous development of cloud computing, the security outsourcing computing technology in the cloud computing environment has been well applied, so that users with limited resources can purchase the endless computing and storage resources provided by the cloud computing platform by paying on demand. , greatly reducing the user's burden on software management and hardware maintenance. Auditing of outsourced databases is a very important technology in security outsourcing, which usually needs to meet the privacy of data and the correctness and integrity of query results. It uploads its own encrypted data to the cloud server through the data owner, and the user puts forward his own query requirements to th...

AI Technical Summary

Problems solved by technology

When the user gets all the results that satisfy his query request, the user must verify the correctness and integrity of the signature one by one, which increases the burden on the user and makes the verification efficiency low

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