Physical Gate Preamble Obfuscation for Wireless Security
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Solution Overview
Problem
Wireless communication channels are vulnerable to eavesdropping and reactive jamming attacks due to the strict structure of communication protocols, allowing attackers to detect and distort packets, which existing security measures fail to adequately address.
Innovation Solution
Implementing physical layer hardware encryption using unique keys generated from channel characteristics to obfuscate the preamble of wireless packets, ensuring secure communication by masking the channel from detection and requiring symmetric keys established on both communication nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If physical layer encryption is implemented to prevent eavesdropping and reactive jamming attacks, then security against intruders is improved, but device complexity and overhead are increased
Solution Approach 1:
The patent applies segmentation by dividing the preamble into multiple segments and encrypting each segment independently using different key bits. This allows the encryption to be implemented at the gate level within the circuit, reducing the overall complexity compared to encrypting the entire preamble as a single unit while still providing comprehensive security coverage.
Solution Approach 2:
The patent implements local quality by applying different encryption characteristics to different portions of the preamble. Each segment of the preamble is encrypted using specific key bits corresponding to its position, creating localized encryption density that optimizes security without uniformly increasing complexity across the entire system.
2Use of energy by moving object
If gate level logic encryption is used to reduce per-gate overhead, then propagation delay and power consumption are reduced, but the security strength against determined attackers is compromised
Solution Approach 1:
The patent applies dynamics by making the encryption keys variable and dependent on the specific preamble segments being encrypted. Rather than using a single static key, the system dynamically selects different key bits for different segments, increasing the effective key space and security strength while maintaining the low overhead benefits of gate-level implementation.
3Device complexity
If symmetric keys are generated from channel characteristics to establish secure communication, then key management complexity is reduced, but the vulnerability to channel-based attacks increases
Solution Approach 1:
The patent applies preliminary anti-action by preemptively encrypting the preamble before transmission using keys derived from channel characteristics. This pre-encryption counteracts potential channel-based attacks by ensuring that even if an attacker captures the transmitted signal, they cannot decrypt the preamble without the corresponding encryption keys, thereby neutralizing the vulnerability before it can be exploited.
Data Source
AI summary
A physical layer based technique secures wireless communication between a transmitter and receiver. The technique involves obfuscating the preamble data of the baseband signal through unique keys that are generated at the transmitter and the receiver based on channel characteristics known only to them.