Ad Hoc Group Call Key Distribution for Secure Terminal Formation
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Solution Overview
Problem
In adhoc group calls within disaster safety communication networks, there is a need for secure communication methods when security information of participating terminals is not pre-stored, particularly in scenarios where administrators are not available to manage group formation.
Innovation Solution
A method and apparatus for generating an adhoc group key (AGK) through a MCX server, involving authentication and encryption processes using key management servers to distribute security information among terminals in an adhoc group call.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If security information is pre-stored in terminal profiles for adhoc group calls, then communication security is maintained, but the system cannot support dynamic group formation when administrators are unavailable
Solution Approach 1:
The patent introduces a key management server as an intermediary between terminals to dynamically provide security information. When a terminal initiates an adhoc group call, the key management server generates and distributes group keys to participating terminals, enabling secure communication without pre-stored security information or administrator intervention.
Solution Approach 2:
The key management server performs preliminary actions by pre-generating and storing security information (group keys) in a centralized location before adhoc group calls occur. This allows terminals to dynamically retrieve necessary security credentials during spontaneous group formations, resolving the contradiction between adaptability and security.
2Adaptability or versatility
If security information is dynamically generated and distributed, then adaptability to spontaneous group calls is improved, but system complexity increases due to additional key management infrastructure
Solution Approach 1:
The key management server operates autonomously to generate, distribute, and manage group keys without requiring administrator intervention or complex manual configuration. The system self-manages the entire security credential lifecycle, reducing operational complexity while maintaining high adaptability for spontaneous group formations.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method of a first terminal in a wireless communication system is provided. The method comprising: generating an AGK for an adhoc group; transmitting an adhoc group communication request message including a list including IDs of a plurality of second terminals included in the adhoc group and connected to the first server; receiving an adhoc group communication return message signed by the first server; performing an encryption and signing operation on the AGK based on first authentication information related to the first terminal and the second authentication information; transmitting an adhoc group communication security material request message including the AGK that is encrypted and signed; receiving an adhoc group communication response message in response to transmitting the adhoc group communication security material request message; and performing a secure communication.