Decentralized Authentication in Wireless Ad-Hoc Networks
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Solution Overview
Problem
In wireless ad-hoc communication systems, the lack of a centralized management device for terminal-authorization-certificates poses challenges in authenticating and managing access rights, as terminals are constantly moving and do not maintain a consistent communication path with a collective management device.
Innovation Solution
A wireless ad-hoc communication system where terminals independently issue terminal-authorization-certificates by transmitting beacon information to suggest certificate issuance requests, allowing for decentralized authentication and access management through the exchange of public key certificates and revocation lists.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a centralized management device is used for terminal-authorization-certificate management, then authentication and access control can be effectively performed, but the system cannot adapt to wireless ad-hoc networks where terminals are constantly moving and communication paths are not consistent
Solution Approach 1:
The patent divides the centralized certificate management function into distributed segments where each terminal can independently issue certificates to other terminals. Instead of one central authority, multiple terminal authorization certificate issuing functions are segmented across the network, allowing the system to maintain authentication reliability while adapting to mobile ad-hoc environments where centralized management is impractical.
Solution Approach 2:
Terminals are empowered to issue their own authorization certificates to other terminals without requiring external centralized management. Each terminal performs self-service authentication by generating and distributing its own certificates, enabling the system to operate reliably in mobile ad-hoc networks where terminals constantly move and centralized management devices are inaccessible.
2Adaptability or versatility
If terminals independently issue certificates without centralized management, then the system becomes adaptable to mobile ad-hoc environments, but authentication security and access control reliability may be compromised
Solution Approach 1:
Before terminals engage in data communication, they perform preliminary authentication by exchanging terminal authorization certificates. This preliminary action ensures that even though terminals independently issue certificates, the authentication reliability is maintained because verification occurs before any actual communication takes place, preventing unauthorized access from the outset.
Solution Approach 2:
The system implements feedback mechanisms where terminals verify received certificates against stored revocation lists and validate certificate authenticity through cryptographic verification. This feedback loop ensures that independently-issued certificates are properly validated, maintaining authentication reliability despite the decentralized issuance process.
3Ease of manufacture
If terminal authorization certificates are managed collectively by a specific device, then certificate issuance and revocation can be centrally controlled, but this approach is unsuitable for wireless ad-hoc networks where communication paths to management devices are not always maintained
Solution Approach 1:
The centralized certificate management function is segmented and distributed to individual terminals. Each terminal maintains its own authorization certificate and can independently issue certificates to other terminals, eliminating the need for continuous communication with a central management device and making the system suitable for mobile ad-hoc networks.
Solution Approach 2:
Each terminal is designed to perform multiple functions: it can act as both a certificate holder and a certificate issuing authority. This multi-functionality allows any terminal to independently manage authentication for itself and others, providing universal certificate management capability across the ad-hoc network without requiring dedicated management infrastructure.
Data Source
AI summary
A wireless ad-hoc communication system in which an attribute certificate can be independently and dispersedly issued is provided. A terminal (B200) transmits a beacon (2011) for participating in a network in the wireless ad-hoc communication system. The beacon (2011) indicates whether or not the terminal (B200) has an attribute certificate. Upon receiving the beacon (2011), a terminal (A100) checks the beacon. If it is determined that the terminal (B200) does not have an attribute certificate, the terminal (A100) transmits an attribute-certificate issuance suggestion message (1032) for suggesting an attribute-certificate issuing request to the terminal (B200). When the terminal (B200) transmits an attribute-certificate issuance request message (2041) in response to this message, the terminal (A100) transmits an attribute-certificate issuance message (1052) to the terminal (B200).