Relay Communication Discovery Using Intermediate Security Keys
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Solution Overview
Problem
In relay communication, the information transmitted between remote and relay UEs lacks security protection, posing a significant security risk during discovery.
Innovation Solution
A method and apparatus for relay communication that involves sending and receiving security information request and response messages to and from network nodes to obtain and utilize discovery intermediate keys for encrypting and integrity protecting communication between UEs, ensuring secure relay communication discovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If relay communication is implemented without security protection, then communication simplicity is maintained, but security risk increases significantly
Solution Approach 1:
The patent introduces network nodes (AMF, AUSF, NAF) as intermediaries between relay UE and remote UE to provide security services. The network node acts as a mediator that receives security information requests from UEs, processes authentication and key generation, and returns security information to enable secure communication without requiring direct trust between UEs.
Solution Approach 2:
The patent implements preliminary security setup before actual communication begins. Network nodes perform authentication, generate discovery intermediate keys, and establish security contexts in advance. This preliminary action ensures that when relay communication starts, security protection is already in place, preventing security risks before they can occur.
2Reliability
If security information requests are sent to network nodes, then communication security is improved, but communication time increases
Solution Approach 1:
Security information is obtained in advance before the actual relay communication begins. The network node generates discovery intermediate keys and security contexts beforehand, so that when relay UE and remote UE need to communicate, the security setup is already complete, minimizing time delays during actual data transmission.
Solution Approach 2:
The patent implements a feedback mechanism where network nodes receive security information requests from UEs, process these requests, and return security information (key pairs, authentication tokens). This feedback loop enables efficient security setup where the network node can quickly respond to authentication requests based on pre-configured security policies.
Data Source
AI summary
A relay communication method is performed by a first user equipment (UE), and includes: sending a security information request message to a first network node, wherein the security information request message is configured to request security information for protecting a relay communication discovery between the first UE and a second UE; and receiving a security information response message sent by the first network node, wherein the security information response message includes the security information.