Device and method for generating transmission key

Abstract

The invention discloses a device and a method for generating a transmission key. The transmission key is generated by two communication parties according to a private key generated by the party and an interactive key transmitted by the opposite party through a transmission key generating algorithm distributed by a third party. Even though the interactive key transmitted by the opposite party is intercepted in the network, the transmission key also cannot be generated separately. The transmission key generating algorithm distributed by the third party makes the algorithms used by the two parties consilient. And the transmission keys generated at the localities of the two parties are equal so as to achieve the effect of the symmetric encipherment algorithm. The local private keys of the two parties are generated randomly and lose efficacy when being used once so as to guarantee that even through the transmission key is stolen or cracked, the next transmission also cannot be influenced. The transmission key generating algorithm is distributed by the third party and is transparent and consilient to the two communication parties, can be distributed again each time or be distributed at regular intervals or at irregular intervals, also can be distributed randomly, and further improves the safety of the interactive key and the transmission key.

Description

Technical field [0001] The present invention relates to the technical field of network security, in particular to a device and method for generating a transmission key. The generated transmission key cooperates with a symmetric encryption algorithm to realize safe encrypted data transmission. Background technique [0002] High-security-related industries often involve a large number of private information transmission scenarios, requiring the use of secure transmission protocols and a secure network environment. While using secure transmission protocols and secure network environments, symmetric cryptographic encryption methods are currently widely used to transmit private information, such as 3DES. [0003] When using the symmetric encryption method, the algorithm that generates the transmission key is the core of the implementation; how to generate and save the transmission key is the fundamental guarantee of the security strength and performance of the encryption method. A good...

AI Technical Summary

Problems solved by technology

However, this approach must not completely avoid risks, and changing the key once needs to regenerate, negotiate and transmit the process, too frequent will greatly increase the implementation cost

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