Chaotic Map Secret Key Generation From Channel Responses
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Solution Overview
Problem
Existing methods for securing wireless networks do not provide unconditional security, relying on computational limitations that can be overcome by eavesdroppers, leading to a need for improved secret key generation techniques.
Innovation Solution
A method utilizing a chaotic map to generate secret keys based on transmission path channel responses, involving sampling, decorrelating, normalizing, and combining sample data to create secure keys, which are then used for encryption and decryption processes between devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard computational methods are used for securing networks, then network security can be maintained under current computational limitations, but unconditional security is not provided and can be broken by eavesdroppers with sufficient computational power
Solution Approach 1:
The patent replaces computational security mechanisms with physical-layer security mechanisms. Instead of relying on computational complexity (mechanical/mathematical system), it uses channel response characteristics and chaotic maps (physical system) to generate secret keys, providing security that is independent of computational power.
Solution Approach 2:
The patent changes the fundamental parameter of security from computational difficulty to physical channel characteristics. By using channel response parameters (fading, multipath effects) and chaotic map parameters, it creates secret keys that are inherently secure regardless of computational capabilities of eavesdroppers.
2Reliability
If complex secret key generation methods are used to improve security, then unconditional security can be achieved, but computational load increases which is unsuitable for low-capability devices
Solution Approach 1:
The patent enables devices to generate secure secret keys using their own received channel responses without requiring complex computational resources from either party. The chaotic map operations are computationally simple compared to traditional cryptographic key generation, allowing low-capability devices to achieve high security with minimal energy consumption.
Solution Approach 2:
The patent substitutes complex cryptographic computational operations with simpler chaotic map operations based on physical channel measurements. This replacement dramatically reduces computational energy requirements while maintaining or improving security levels.
3Ease of operation
If traditional initialization packets are used for key agreement, then device compatibility is maintained, but reliability is compromised when packets are lost or corrupted in wireless transmission
Solution Approach 1:
The patent implements a feedback mechanism where devices verify whether initialization packets were successfully received and processed. If packet loss or corruption is detected, the system can request retransmission or use alternative key generation paths, ensuring reliable key agreement while maintaining compatibility with standard initialization protocols.
Data Source
AI summary
The technology includes a method for generating a secret key. The method includes receiving initialization data, the initialization data includes an initialization packet and a transmission path channel response; generating sample data based on the transmission path channel response; and generating a secret key based on the sample data utilizing a chaotic map.