Distributed cloud security storage method and system and storage medium

Abstract

The invention discloses a distributed cloud security storage method and system and a storage medium, and the method comprises the steps: segmenting a target file into a plurality of data blocks, carrying out the block encryption of the data blocks through an SM4 or AES encryption algorithm, and obtaining encrypted data blocks; randomly scrambling the encrypted data block by using a preset scrambling algorithm; uploading the scrambled encrypted data blocks to different cloud hosts for distributed storage, and establishing a storage index in a local host; and according to the storage index, downloading the encrypted data block corresponding to the target file from the cloud host, performing inverse scrambling according to the scrambling key, performing decryption according to the encryption key, and recombining the target file. Block encryption and random scrambling of the target file are supported, distributed storage of a plurality of different cloud hosts at the cloud end is transmitted, an authorized user can open a system and download encrypted data blocks corresponding to the target file from the cloud hosts, the user is supported to browse and use the file without barriers, and the data leakage in the transmission process can be effectively avoided.

Description

technical field [0001] The invention relates to the field of cloud storage, in particular to a distributed cloud security storage method, system and storage medium. Background technique [0002] Data security and privacy protection have become global issues. In recent years, data security incidents such as data theft, privacy leakage and data abuse have occurred frequently, causing huge economic losses to the government, enterprises and individuals. With the widespread application of new-generation information technologies such as cloud computing and big data and the deployment of data center virtualization, enterprise application systems have begun to migrate to the cloud, and data sources are more diverse. Traditional border security protection methods are difficult to work, and data is facing higher security risks. For example, in the process of enterprises migrating to the cloud, data security and privacy leakage have become the main concerns of enterprises, especially...

AI Technical Summary

Problems solved by technology

However, BS structure security is low

First, there is a risk of being stolen during data transmission, and the security risk of data without local encryption is extremely high

Second, since the applications are all installed in the cloud, and the applications and data are in the cloud, there is a high risk of decompilation. Once the cloud security defense line is breached, it is easy to cause the loss of applications and data

Third, since the key is also stored in the cloud, there is a greater risk of data security

Even if an attacker steals several cloud-encrypted data blocks, he cannot reassemble and restore the original files without the encryption key and scrambling key

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