Network communication encryption method based on contents

Abstract

The invention provides a network communication encryption method based on contents. Symmetrical encryption algorithms are respectively arranged at a sending end and a receiving end, and then steps are listed as follows: 1) the sending end confirms an encryption algorithm factor according to the contents in the current data to be sent, then the minimum number of bytes N needed by a secret key of the current encryption algorithm and a corresponding algorithm is selected according to the encryption algorithm factor, and then the current encryption secret key is obtained via calculation; 2) the sending end uses the current encryption algorithm and the current encryption secret key to encrypt the current data to be sent to obtain the current encryption data so that the current communication cipher is generated and sent; and 3) the receiving end receives the current communication cipher to obtain the corresponding decryption algorithm factor and data to be decrypted, and corresponding decryption is performed so that the current communication plaintext is generated. The adopted encryption algorithm number and the adopted secret key are selected according to the contents of the data to be sent via calculation without transmission of extra secret key information so that the method is simple and rapid and high in security.

Description

technical field [0001] The invention relates to the field of network data security transmission, in particular to a content-based network communication encryption method. Background technique [0002] There are many commonly used encryption communication methods, which can be roughly divided into two categories according to the type of key, symmetric encryption (private key encryption) communication and asymmetric encryption (public key encryption) communication. [0003] In symmetric encrypted communication, the same key is used for encryption and decryption, that is, the encryption key can also be used as the decryption key. Symmetric encrypted communication is simple and fast to use, but the disadvantages are also obvious. Additional key information needs to be transmitted, which is easy to be hacked. Intercept in the middle, and decrypt the data. [0004] Asymmetric encrypted communication requires two keys, a public key and a private key. The public key and the private...

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to overcome the disadvantages in the prior art that an additional transmission key is required for symmetric encryption communication and is easy to be intercepted, the security is not high enough, the communication speed of asymmetric encryption is slow, and the encrypted ciphertext is longer. A Content-Based Network Communication Encryption Method Using Symmetric Encryption