Encryption/decryption method and system for data transmission

Abstract

The invention discloses an encryption / decryption method and a system for data transmission. The method comprises the steps as follows: a client side sends a login authentication request message that is encrypted through an initial key to a server side; the server side receives the login authentication request message, performs the authentication matching after decryption, and generates a dynamic key; the server side generates and sends a login result message; the client side receives the login result message and acquires the dynamic key; the client side and the server side combine the initial key with the dynamic key so as to generate a communication key; and the communication key is utilized to encrypt / decrypt data between the client side and the server side. The system comprises: a login authentication unit, a first communication unit and a communication key generating unit all positioned on the client side; and a second communication unit, an authentication matching unit, a dynamic key generating unit, a login result unit and the communication key generating unit all positioned on the server side. Therefore, the problem that an interact protocol between the client side and the server side is easy to be decoded can be solved.

Description

technical field [0001] The present invention relates to the communication field, in particular to an encryption / decryption method and system for data transmission. Background technique [0002] The current wireless communication data transmission has the problem of unstable and insecure transmission. The existing solutions to solve the security of server-side and client-side business interaction include static keys, dynamic keys and other methods. [0003] Static keys are generally placed on the client and server, and the two parties agree to use the key for encryption and decryption during communication; the dynamic key method starts to use the plaintext transmission key, and the two parties dynamically agree on the key at the beginning of the communication. Generally, it is generated by the server and sent to the client in plain text, and the two parties agree to use this key for encryption and decryption during communication. [0004] The existing static key method has t...

AI Technical Summary

Problems solved by technology

[0004] The existing static key method has the risk of being easily cracked. Because the key is fixed, the possibility of the key being attacked and cracked is greatly increased. Once the key is cracked, the business is at risk of being attacked.

Although the dynamic key changes dynamically, it is easy to be captured due to the initial plaintext interaction

[0005] If the interaction protocol between the client and the server is cracked and simulated, the commercial business process may be maliciously attacked, embezzled, and profited, and the protection of user rights and interests cannot be guaranteed

Images