Data transmission ciphering and integrity checking method

Abstract

The invention relates to an encryption and integrality check method of a data-transmission belonging to the electric communication technique field. In the invention, an originating node and a destination node share a root key not known by attackers, the root key and message authentication codes of all the prior transferred data generate an encryption key for encrypting the prior transferred data; at the present an encrypted data and a message authentication code corresponding the data node are transferred from the originating node to the destination node. The invention can encrypt and check the data transferred between the nodes and have advantages of safety and high performance.

Description

technical field

[0001] The present invention relates to a data transmission method in the technical field of telecommunications, in particular to an encryption and integrity check method for data transmission. Background technique

[0002] To protect information, data in transit needs to be encrypted and integrity checked. Encryption is to protect the confidentiality of data, so that attackers cannot understand the original meaning of the data intercepted on the transmission path; integrity verification is to prevent attackers from maliciously modifying the transmitted data, injecting forged data, replaying Tampering with data transmitted in the past, blocking currently transmitted data, reversing the order of data transmission, etc. This protection requirement for data transmission exists in many fields; for example, data is transmitted from a certain processor inside the same computer to another processor; another example is that data is transmitted from one computer syst...

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