5G network authentication method and system based on DH ratchet algorithm

Abstract

The invention relates to a 5G network authentication method and system based on a DH ratchet algorithm. The method comprises the steps that user equipment encrypts identity information through a ratchet wheel secret key and sends the identity information to a server for verification, and the confidentiality of the identity information is guaranteed; ratchet key pairs are generated for each entityin a 5G network, so that each entity encrypts transmission information through a ratchet key of the entity when transmitting information, information safety is guaranteed, mutual verification betweenthe entities is guaranteed by generating respective identity tokens of the entities, and counterfeit attacks are avoided. Through ratchet wheel stepping, each entity generates different ratchet wheelsecret keys in the session process, so that each session is encrypted by using different ratchet wheel secret keys, and the message transmission process is safer; the session key in 5G is generated through the ratchet wheel key instead of the shared key K, so that the security problem caused by leakage of the shared key K is solved.

Description

technical field [0001] The present invention relates to the field of information security, in particular to a 5G network authentication method and system based on a Diffie-Hellman (DH) ratchet algorithm. Background technique [0002] Mobile communication technology is widely used for voice, text and Internet access. Through these technologies, user equipment, usually a mobile phone, can connect to a base station through a wireless network and then connect to a service provider. Recently, two generations of mobile communication standards, 3G and 4G, have been designed by the Third Generation Partnership Project (3GPP) alliance, and the fifth generation (5G) mobile communication standard is being finalized, and the draft is now available . These standards describe protocols designed to provide security guarantees for subscribers and service providers. One of the most important protocols is Authentication and Key Agreement (AKA), which allows subscribers and their service pro...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a 5G network authentication method and system based on the DH ratchet algorithm to solve the problems of poor security of the existing 5G system and easy leakage of the shared key.

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