Seed-Based Secure Messaging With Feedback-Guided Updates
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Solution Overview
Problem
Current secure transmission methods rely on key-based encryption, which are vulnerable to attacks due to complex key management protocols, and do not protect messages transmitted before key agreement, leaving them insecure.
Innovation Solution
A communication method that uses random seeds for security processing, updating the seed only when correct message receipt is confirmed, thereby preventing errors from spreading and enhancing security without affecting performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If key-based encryption is used for secure transmission, then message security is improved, but key management complexity increases and vulnerabilities arise
Solution Approach 1:
The patent extracts the security function from traditional key-based encryption by using a randomness extractor to generate random seeds directly from transmitted messages. This eliminates the need for separate key management systems while maintaining security, as the random seeds are derived on-demand from the message content itself rather than requiring pre-shared or exchanged keys.
Solution Approach 2:
The system makes the communication parties self-sufficient by enabling them to generate their own random seeds from the transmitted messages without external key management infrastructure. Each party independently extracts random seeds from received messages, eliminating dependence on complex key distribution and management protocols.
2Reliability
If random seed updates are performed frequently to enhance security, then message security is improved, but communication performance deteriorates
Solution Approach 1:
The patent implements feedback-based random seed updates where the transmitter only updates its random seed when it receives an ACK message confirming successful reception. This feedback mechanism ensures security updates occur only when necessary and when the receiver has successfully processed the previous message, avoiding unnecessary updates that would degrade performance.
Solution Approach 2:
The random seed update mechanism is made dynamic and adaptive rather than fixed. The system adjusts the timing and frequency of random seed updates based on actual communication conditions and feedback from the receiver, updating only when security is needed and performance impact is minimized.
3Reliability
If error containment measures are implemented to prevent error spreading, then message security is improved, but system complexity increases
Solution Approach 1:
The patent segments the communication process into distinct phases with separate random seeds for different message groups. By dividing the message stream into segments that use different random seeds, errors are contained within specific segments and cannot propagate to other segments, simplifying error containment compared to a monolithic system-wide error correction approach.
Data Source
AI summary
This application discloses a communication method and apparatus. The method includes: A first apparatus performs security processing on a first message based on a first random seed, to obtain a second message. After obtaining a third message based on the second message, the first apparatus sends the third message to a second apparatus. If the first apparatus receives feedback information from the second apparatus, the first apparatus updates the first random seed to a second random seed, where the feedback information indicates that the second apparatus correctly receives the third message.