Random-Seed Secure Communication to Prevent Packet Error Propagation
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Solution Overview
Problem
Existing secure transmission methods, including key-based encryption and physical layer security, are vulnerable to exploitation and result in communication overheads and delays, while non-target receivers can still decode transmitted information with high probability.
Innovation Solution
A secure communication method that encrypts data packets using a random seed generated based on previous packets or a random vector, allowing the transmitter to adjust the seed based on decoding feedback to prevent error propagation and maintain security without key management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If key-based encryption (symmetric or asymmetric) is used for secure transmission, then communication security is improved, but key maintenance and management require complex protocols that increase system complexity and create vulnerabilities
Solution Approach 1:
The patent extracts the security function from traditional key-based encryption protocols and implements it directly at the physical layer through signal processing techniques. Instead of managing cryptographic keys through complex protocols, the system uses physical channel characteristics and signal manipulation to provide security, eliminating the need for complex key management while maintaining security.
Solution Approach 2:
The patent replaces the mechanical/cryptographic system of key management with a physical layer signal processing approach. By using physical channel properties and signal manipulation techniques, the system substitutes complex cryptographic protocol management with simpler physical layer operations that inherently provide security without requiring key maintenance.
2Reliability
If complex encryption protocols are used, then communication security is improved, but communication overhead and delays increase, making the system unable to cope with highly dynamic networks
Solution Approach 1:
The patent extracts security functionality from higher-layer encryption protocols and implements it at the physical layer, eliminating the time-consuming key management and encryption/decryption operations that occur at higher layers. This extraction reduces communication overhead and delay while maintaining security.
Solution Approach 2:
The system performs security-related signal processing and channel characterization in advance, before actual data transmission. By preliminarily establishing physical layer security parameters and channel characteristics, the system avoids time-consuming security operations during active communication, reducing overhead and enabling rapid response to dynamic network conditions.
3Productivity
If physical layer security transmission technology is used, then basic security and information transmission are achieved, but the security is limited and non-target receivers still have a high probability of obtaining transmitted information
Solution Approach 1:
The patent applies different signal processing techniques and security measures to different spatial locations or channel conditions. By tailoring the security approach to local channel characteristics and receiver positions, the system enhances security against non-target receivers while maintaining efficient information transmission to legitimate receivers. This localized approach allows differentiated security treatment without compromising overall transmission productivity.
Data Source
AI summary
This application provides a secure communication method and apparatus, and relates to the field of wireless communication technologies. In the method, a communication apparatus receives an ith codeword, where the ith codeword is obtained by encoding an ith first data packet. The ith first data packet is obtained by encrypting an ith second data packet based on an ith random seed. The communication apparatus sends response information of the ith codeword based on a decoding result of the ith codeword, where the response information indicates that the ith codeword is successfully decoded or fails to be decoded.