File encryption and decryption method, device and system

Abstract

The embodiment of the invention provides a file encryption and decryption method, device and system. The method comprises the following steps: acquiring a security level encryption file; acquiring the security-level encrypted file by encrypting an encrypted file through a security-level public key; verifying the security-level encrypted file according to the security-level encrypted file abstract in the file meta-information in the data bus; wherein the file meta-information is information for describing the attribute of the security-level encrypted file; and if the security-level encrypted file passes the verification, obtaining an encrypted file corresponding to the security-level encrypted file, and decrypting to obtain a plaintext corresponding to the encrypted file. In the embodiment of the invention, the data bus is adopted to store the file meta-information of the security-level encrypted file, so that the control of file access can be realized, and the security of file access is improved.

Description

technical field [0001] The present application relates to the field of security technology, in particular to a file encryption and decryption method, device and system. Background technique [0002] At present, with the increasing number of enterprise files, in order to improve the efficiency of file management, many file management solutions have been proposed in the prior art, mainly including the following two implementation methods: [0003] The first file management solution: file management server. [0004] As a common solution for centralized file management, the file management server is usually integrated into the OA system as a private network disk for enterprise content for enterprise file sharing. In this scheme, the user uploads the file to the file management server, and controls the access to the file in the file management server through authorization. Corresponding to the user or user group that has obtained access rights, they can directly access files in...

AI Technical Summary

Problems solved by technology

[0010] Due to the above-mentioned problems in the existing methods, the embodiment of the present invention proposes a blockchain-based file encryption and decryption method, device, and system to solve the contradiction between the centralized management of the above-mentioned file management system and the full encryption of files

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