An electronic file access control method based on block chain and known range encryption

Abstract

The invention discloses an electronic file access control method based on block chain and known range encryption. Current technology has issues with electronic document security and sharing. In the present invention, the system is initialized first, and the file owner encrypts and uploads the electronic file according to the range of knowledge, and obtains the storage location index of the file ciphertext; the file visitor downloads the ciphertext of the electronic file and decrypts it to obtain the plaintext of the electronic file; Update keys when changed. Electronic files are stored in the off-chain database in the form of ciphertext, and the known range of the electronic file, the key distribution polynomial, and the position index of the ciphertext in the database are stored on the blockchain, which not only ensures the security of the ciphertext file Integrity and non-tampering realize the security of file storage and ensure the efficient sharing of files. The method of the invention improves the security of the electronic files in the process of storage and sharing, and realizes the fine-grained access control of the electronic files.

Description

technical field [0001] The invention belongs to the field of electronic file security management and control, and in particular relates to an electronic file access control method based on block chain and knowledge range encryption. Background technique [0002] At present, more and more information is stored and distributed in the form of electronic files in the e-government network and enterprise network. Electronic files have become one of the important data assets of party and government organs, departments, enterprises and institutions at all levels. Once an electronic file is leaked, it will seriously affect the core interests and self-security of party and government organs, departments, enterprises and institutions at all levels, and even threaten national security and interests. How to ensure the security and sharing of these electronic files has become a management problem faced by party and government organs, departments, enterprises and institutions at all levels...

AI Technical Summary

Problems solved by technology

This method of data sharing through public key encryption and decryption increases the overhead and burden of data owners

In addition, at present, it is not possible to implement "one text, one secret" access control on electronic files based on the scope of knowledge, and it is impossible to effectively prevent users from accessing electronic files beyond their authority.

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