File sharing method based on encryption and permission system

Abstract

The invention discloses a file sharing method based on an encryption and permission system. The file sharing method comprises the implementation steps that (1) a server establishes user information and sets the security level of a user; (2) the user logs in and carries out authentication; (3) the user sets the security level of a secret shared file, carries out encryption through a random secret key, stores the unique authentication code, the security level and the encryption secret key of the encrypted secret shared file on the server, and sends the encrypted secret shared file to a network; (4) when the secret shared file is used, a client sends a decryption request including the unique authentication code of the secret shared file and the security level of the user, if the security level of the user is higher than or the same as the security level of the secret shared file, the client can receive a decryption secret key fed back by the server, the client decrypts the secret shared file through the decryption secret key, and opens the secret shared file, and if the security level of the user is lower than the security level of the secret shared file, rejection information is fed back. The file sharing method based on the encryption and permission system has the advantages of being high in safety, convenient to use and capable of being used for sharing of secret files inside a unit.

Description

technical field [0001] The invention belongs to the technical field of computer information security, and in particular relates to a file sharing method, which can be used for safe use of confidential files within an organization. technical background [0002] With the development of information technology and the continuous enhancement of enterprise informatization, the security of internal information is becoming more and more serious. How to share internal secret files safely and systematically within the enterprise has become a problem that people must think about. Traditionally, the sharing of secret files is placed in shared folders within the enterprise, but when the files are downloaded to their own computers by employees, the security of secret files cannot be guaranteed. If the downloaded file is immediately encrypted with encryption software, although its security can be guaranteed, it will lose its shareability at the same time. The file can only be used by the e...

AI Technical Summary

Problems solved by technology

Traditionally, the sharing of secret files is placed in the shared folder within the enterprise, but when the files are downloaded to their computers by employees, the security of the secret files cannot be guaranteed

If you use encryption software to encrypt the downloaded file immediately, although its security can be guaranteed, but at the same time, its shareability will be lost. The file can only be used by the encryptor himself, and cannot be shared with other colleagues.

Therefore, when sharing files within a unit, it is difficult to satisfy both security and sharing.

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