File security sharing method and system

Abstract

The invention discloses a file security sharing method and system, and relates to the technical fields of network and information security. The method includes: the file receiver obtains a copy of the encrypted file, the encrypted file copy includes the original file encrypted by the symmetric key and the symmetric key encrypted by the public key of the file receiver; Decrypt the encrypted symmetric key to obtain the symmetric key; use the symmetric key to decrypt the encrypted original file to obtain the original file. The file security sharing method, system and terminal of the present disclosure do not require the server to perform file encryption, decryption and verification, and realize file-level point-to-point security sharing. Neither the server nor the service provider can obtain the decryption authority of the file, so the security Higher; at the same time, the data signature of the file sharing party is used to realize the credibility of the file source.

Description

technical field [0001] The invention relates to the technical field of network and information security, in particular to a file security sharing method and system. Background technique [0002] With the rapid development of Internet applications, the value of user data continues to increase. Users have put forward higher requirements for the security of services such as cloud storage. In this context, various encryption technologies, authentication and authorization, access control and other technologies are continuously applied to cloud storage services to ensure the security of user data information. [0003] How to maximize the safe sharing of data information on the basis of ensuring the security of user data information has become a major technical problem faced by information services such as cloud storage. [0004] At present, the industry has proposed a method based on shared folders or server-based secure sharing, which can realize secure sharing of encrypted file...

AI Technical Summary

Problems solved by technology

[0004] At present, the industry has proposed a method based on shared folders or server-based secure sharing, which can realize secure sharing of encrypted files, but the setting of secure sharing and encryption and decryption processing need to be completed on the server side, requiring system administrators or service providers. Participating in it, there are certain security risks in typical application environments such as cloud computing and multi-tenancy

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