File safe sharing method, system and terminal

Abstract

The invention discloses a file safe sharing method, system and terminal, and relates to the technical field of networks and information safety. The file safe method comprises the steps that a file receiving side obtains an encrypted file copy, the encrypted file copy comprises an original file encrypted by a symmetrical secret key and the symmetrical secret key encrypted by a public key of the file receiving side; a private key of the file receiving side is used for decrypting the encrypted symmetrical secret key and the symmetrical secret key is obtained; the symmetrical secret key is used for decrypting the encrypted original file and an original file is obtained. According to the file safe sharing method, system and terminal, a server does not need to execute the encryption, decryption and verification of the file, point-to-point safe sharing of the file level is achieved, the server side and a service provider cannot obtain the decryption authentication of the file, and therefore safety is higher; in addition, a digital signature using the file sharing method achieves the credibility of the source of the file.

Description

technical field [0001] The invention relates to the technical field of network and information security, in particular to a file security sharing method, system, file receiver terminal and file sender terminal. 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, whic...

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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