Secure Fallback Network Device Authentication
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Solution Overview
Problem
Existing WAN fallback operations do not adequately support secure communications during network failures, as they lack comprehensive secure device authentication and certification for large-scale operations.
Innovation Solution
Implementing a method where network devices are initialized and authenticated by a call manager, providing security credentials and certificates to secondary devices, allowing secure fallback operations by verifying the identity of fallback devices through certificate matching during WAN failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fallback operations are implemented without comprehensive secure device authentication, then network functionality is maintained during WAN failure, but security is compromised and untrusted devices may initiate secure calls
Solution Approach 1:
The system performs preliminary authentication by obtaining device identifiers from secondary devices and verifying them against a database of authorized fallback devices before allowing fallback operations to commence. This preliminary security check ensures that only trusted devices can assume call manager functions during WAN failure, preventing unauthorized access while maintaining network functionality.
2Object-affected harmful factors
If comprehensive secure device authentication is implemented, then security is maintained during fallback operations, but device complexity and authentication overhead increase
Solution Approach 1:
The system uses device identifiers as simplified representations (copies) of full device security credentials. Instead of performing complex cryptographic verification of complete security certificates during fallback authentication, the system authenticates devices based on their identifiers matched against an authorized list, dramatically reducing authentication complexity while maintaining security.
Solution Approach 2:
The system introduces an intermediary authentication mechanism that acts as a mediator between secondary devices and the fallback device. The call manager or authentication server serves as an intermediary that verifies device identifiers and grants authorization, simplifying the authentication process for both the secondary devices and the fallback device while maintaining comprehensive security checks.
3Reliability
If device identifiers are verified against a database during initialization, then secure fallback operations are enabled, but processing time and initialization overhead increase
Solution Approach 1:
Device authentication is performed during the initialization phase before fallback operations are needed. The system obtains device identifiers from secondary devices and verifies them against the authorized database during normal operation setup, so that when WAN failure occurs, the authentication is already complete and the fallback device can immediately assume operations without additional verification delays.
4Object-affected harmful factors
If fallback device identity verification is implemented, then only trusted devices can assume call manager functions, but the authentication process complexity increases
Solution Approach 1:
The system uses device identifiers as simplified copies of full device security credentials. Instead of performing complex cryptographic verification of complete security certificates, the system authenticates devices based on their identifiers matched against an authorized list stored in the database, dramatically reducing authentication process complexity while maintaining security.
Data Source
AI summary
A network device may provide secure fallback operations. The device includes a port allowing the device to communicate with a network and a processor to generate a security credential, provide the security credential to a call manager during initialization, and provide the security credential to a secondary device during fallback operations. The network device may include a memory to store the security credential and routing information for fallback operations.