Spatial Bit Stream Security Processing for Keyless Transmission
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Solution Overview
Problem
Existing secure transmission methods, such as key-based encryption, are vulnerable to attacks due to complex key management protocols, and cannot secure messages transmitted before key agreement, leading to reduced security.
Innovation Solution
A communication method that combines and processes multiple spatial bit streams to spread errors across them, using physical layer secure transmission techniques like adding noise to non-target receiving nodes, thereby enhancing security without affecting overall communication 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 the complex key management layer and implements it directly at the physical layer through spatial bit stream processing. By taking out the security mechanism from the protocol layer, the system eliminates key management complexity while maintaining security through physical layer error spreading across multiple spatial streams
Solution Approach 2:
The patent replaces the mechanical/key-based encryption system with a physics-based approach using spatial bit stream manipulation and error spreading. Instead of relying on cryptographic keys and protocols, security is achieved through physical layer processing that spreads errors across multiple spatial streams, making interception and decryption by adversaries infeasible
2Reliability
If key-based encryption is applied, then security is improved, but messages transmitted before key agreement cannot be secured
Solution Approach 1:
The patent implements preliminary security processing at the physical layer before higher-layer protocols execute. By combining and securing spatial bit streams at the physical layer, the system provides security from the very beginning of transmission without requiring prior key agreement, eliminating the time loss associated with key establishment protocols
3Reliability
If physical layer secure transmission processing is performed on all remote units, then information transmission security is improved, but communication performance is affected
Solution Approach 1:
The patent applies security processing selectively to specific spatial bit streams rather than uniformly to all remote units. By combining multiple spatial bit streams and applying security processing to the combined stream, the system achieves local optimization where security is enhanced for targeted streams while maintaining communication performance for others, thus resolving the contradiction between security and productivity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach improves information transmission security by spreading errors across multiple spatial bit streams, deteriorating decoding performance of non-target receiving nodes, while minimizing impact on communication performance.
Implementation Method 1
the first apparatus may perform security processing on the plurality of combined spatial bit streams. In this way, an error spreads between the plurality of spatial bit streams. If an error occurs in a spatial bit stream received by a non-target receiving node, for example, a packet loss occurs, an error also occurs in another spatial bit stream received by a target receiving node
Implementation Method 2
the performing physical layer secure transmission processing may include: adding noise, for example, adding artificial noise. This design is easy to implement. the first apparatus may add the noise to non-signal space of a corresponding remote unit. According to this design, impact of the added noise on signal transmission can be reduced
Data Source
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AI summary
This application discloses a communication method and apparatus. The method includes: After performing security processing on a plurality of combined spatial bit streams, a first apparatus may send the plurality of spatial bit streams or modulation signals corresponding to the plurality of spatial bit streams. According to the method, errors propagate across the plurality of spatial bit streams. When an error occurs in a spatial bit stream received by a non-target receiving node, an error also occurs in another spatial bit stream received by a target receiving node, so that decoding performance of the non-target receiving node can be deteriorated, and information transmission security can be improved.