Secure Packet Communication Using Feedback-Synced Random Seeds
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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 high communication overheads, failing to address the dynamic nature of future networks and allowing non-target receivers to decode transmitted information effectively.
Innovation Solution
A secure communication method that encrypts data packets using a random seed, where the seed is generated based on previous packets, and adjusts the seed based on decoding feedback to prevent error propagation, ensuring synchronization only with legitimate receivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If key-based encryption (symmetric or asymmetric) is used to ensure secure transmission, then communication security is improved, but key maintenance and management require complex protocols resulting in extra communication overheads and delays
Solution Approach 1:
The patent extracts the security function from traditional key-based encryption protocols and relocates it to the physical layer through random seed generation. Instead of managing cryptographic keys through complex protocols, the system generates random seeds directly from physical channel characteristics, eliminating the need for key maintenance and management protocols while maintaining security.
Solution Approach 2:
The patent introduces random seeds as an intermediary between the transmitter and receiver, generated from physical channel characteristics. These seeds serve as the basis for encoding and decoding without requiring traditional key exchange protocols, thereby simplifying the system while maintaining security.
2Reliability
If key-based encryption protocols are implemented, then communication security is improved, but the complex protocols result in extra communication overheads and delays
Solution Approach 1:
The patent performs preliminary action by generating random seeds from physical channel characteristics before data transmission begins. The seeds are generated and synchronized in advance through physical layer measurements, eliminating the need for time-consuming key exchange protocols during the communication process.
Solution Approach 2:
The patent replaces the mechanical system of key exchange protocols with a physics-based approach. Random seeds are generated from physical channel characteristics such as multipath fading and Doppler effects, substituting cryptographic key management with physical layer phenomena that occur naturally during transmission.
3Ease of manufacture
If physical layer security transmission technology (secure coding, secure waveform modulation, artificial noise) is used, then basic security is provided, but the security is limited and non-target receivers still have a high probability of obtaining transmitted information
Solution Approach 1:
The patent changes the fundamental parameter from physical layer signal manipulation to random seed-based encoding. Instead of modifying waveforms or adding artificial noise, the system encodes data using random seeds generated from channel characteristics, providing stronger security while maintaining implementation simplicity.
Solution Approach 2:
The patent combines multiple security mechanisms into a composite approach: random seed generation from physical characteristics, systematic error propagation prevention through sequence number checking, and feedback-based seed updates. This composite security mechanism provides stronger protection than any single physical layer technique alone.
4Reliability
If random seed encryption is used to improve security, then communication security is improved, but decoding errors may propagate across different packets
Solution Approach 1:
The patent implements feedback mechanisms where the receiver checks sequence numbers and sends acknowledgments for correctly decoded packets. When a decoding error is detected, the system uses feedback to reset the random seed at the transmitter, preventing error propagation to subsequent packets while maintaining security through continued use of randomization.
Solution Approach 2:
The patent prepares for potential decoding errors by implementing sequence number verification and feedback mechanisms in advance. When errors are detected, pre-established reset procedures are triggered to prevent error propagation, cushioning the system against the harmful effects of decoding failures.
Data Source
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AI summary
This application provides a secure communication method and apparatus, and relates to the field of wireless communication technologies, to improve data transmission performance. 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. Based on the foregoing solution, a communication apparatus at a transmitter end may determine, based on the response information, whether a communication apparatus at a receiver end correctly decodes the ith codeword. When transmitting an (i+1)th codeword, the communication apparatus at the transmitter end may adjust a random seed based on whether the receiver end correctly decodes the ith codeword. This avoids further error propagation when the ith codeword fails to be decoded.