Secure Key Exchange Using Session-Aware Implicit Signaling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing security establishment procedures, such as SPAKE2+, are vulnerable to man-in-the-middle attacks and require multiple round trips, which can be inefficient and time-sensitive, especially in wireless networks with constrained devices.
Innovation Solution
Implementing a method where security establishment messages are associated with a session identifier and utilize other-purpose information for implicit signaling of key derivation parameters, reducing the need for additional signaling and enabling adaptive key derivation without extra space or energy consumption, thus enhancing security and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional security establishment procedures (e.g., SPAKE2+) are used, then security authentication can be achieved, but the protocol requires multiple round trips which increases latency and is inefficient for constrained devices
Solution Approach 1:
The patent applies preliminary action by pre-establishing security context and parameters before the actual key exchange. Devices perform security establishment procedures in advance, storing security context locally. When communication is needed, the pre-established context is reused, eliminating the need for multiple round trips during actual key exchange, thus reducing latency while maintaining security.
2Reliability
If additional signaling is used for key derivation parameters, then key exchange security can be improved, but this increases space and energy consumption which is problematic for constrained devices
Solution Approach 1:
The patent applies universality by making security context and parameters reusable across multiple communication sessions. Once security parameters are established, they serve multiple purposes and can be reused for subsequent key exchanges without requiring additional signaling. This multi-functionality reduces both energy consumption and space requirements while maintaining security.
3Reliability
If multiple round trips are required for security establishment, then authentication can be performed, but this reduces productivity and efficiency of communication setup
Solution Approach 1:
By performing security establishment in advance and caching security context, the system enables rapid authentication for subsequent communications. The preliminary security setup eliminates the need for repeated multi-round-trip authentication processes, significantly improving communication setup efficiency while maintaining robust authentication.
4Ease of manufacture
If conventional key derivation functions with fixed iteration counts are used, then key generation can be performed, but this reduces adaptability to different security requirements and network conditions
Solution Approach 1:
The patent applies dynamics by making key derivation parameters adaptive rather than fixed. The system dynamically adjusts iteration counts and other KDF parameters based on security requirements and network conditions. Security context includes flexible parameters that can be modified for different communication scenarios, enabling both ease of key generation and adaptability to varying security needs.
Data Source
AI summary
The invention relates to methods and devices for setting up a secure communication channel with an improved key exchange for a security establishment protocol or procedure.