A blockchain-based data audit and security deduplication cloud storage system and method

Abstract

The invention belongs to the technical field of cloud computing, and discloses a blockchain-based data audit and security deduplication cloud storage system and method; including data security deduplication and audit label generation, probabilistic integrity audit, smart contract arbitration and data Decrypt four processes. Before data outsourcing, users use convergent encryption technology to encrypt data and delete redundant data on the cloud server; use probabilistic verification methods to verify the integrity of outsourced data; smart contracts automatically perform verification of integrity audit results and fair arbitration. When the security is destroyed, the cloud server is punished and the user is compensated for the corresponding damages; the original plaintext data is obtained after the user downloads the data and performs the data decryption operation. The invention solves the problem that the traditional data audit cannot realize automatic execution of arbitration. In addition, the present invention also supports the function of deduplication of ciphertext data to protect the consistency of user data, allowing users to effectively obtain correct plaintext data after decryption is completed.

Description

technical field [0001] The invention belongs to the technical field of cloud computing, and in particular relates to a blockchain-based data audit and safe deduplication cloud storage system and method. Background technique [0002] Cloud computing provides users with flexible computing and storage resources. It greatly reduces the burden of user software and hardware management, thus attracting more and more individual and enterprise users to outsource data and store it on cloud servers. However, due to the outsourced storage of user data on cloud servers, the user's ownership and management rights are separated, which makes it difficult for users to verify the integrity of their sensitive data. In the actual cloud computing environment, various software and hardware failures and the existence of malicious adversaries may lead to malicious tampering or even deletion of sensitive data outsourced on cloud servers. In 2015, the Belgian power grid was hit by lightning, causin...

AI Technical Summary

Problems solved by technology

[0006] (1) The existing data audit scheme can support the integrity audit of user data, but does not consider the issue of fair arbitration, so that even if the user finds that the integrity of his data has been damaged, he still cannot effectively obtain corresponding compensation

[0007] (2) The existing integrity auditing scheme cannot well support the data deduplication function, especially the consistency of user data cannot be guaranteed. It is difficult for the existing technology to realize data security deduplication, probabilistic integrity audit and audit results at the same time. fair arbitration

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