Optical Signal Generation for Wireless Physical Layer Security
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Solution Overview
Problem
Current security measures do not provide telesecurity in the physical layer for wireless communication, as they are ineffective in preventing eavesdropping, unlike optical fiber communication where techniques like Y-00 optical communication quantum cryptography can be applied.
Innovation Solution
A signal processing system that generates multivalued information as an optical signal, converts it to an electrical signal, and transmits it as a radio wave, utilizing the Y-00 optical communication quantum cryptography protocol to ensure encryption and secure transmission in wireless communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multivalued information is transmitted as an optical signal using Y-00 optical communication quantum cryptography, then telesecurity in the physical layer is provided for optical fiber communication, but telesecurity in the physical layer cannot be provided for wireless communication
Solution Approach 1:
The patent introduces an optical signal as an intermediary carrier to transfer multivalued information through wireless transmission. The system converts electrical signals representing multivalued information into optical signals for transmission, then converts them back to electrical signals at the receiver. This intermediary optical signal enables the application of quantum cryptography principles to wireless communication, resolving the contradiction between maintaining physical layer security and adapting to wireless communication environments.
Solution Approach 2:
The patent changes the physical state and transmission medium parameters from direct electrical signal transmission to optical signal transmission and back. By converting the information carrier from electrical to optical domain and utilizing the properties of optical signals (including shot noise characteristics), the system enables quantum cryptography-based security in wireless communication, thereby adapting the security mechanism to a different communication medium while maintaining its effectiveness.
2Reliability
If conventional encryption techniques are used in wireless communication, then transmission can be performed, but physical layer security against eavesdropping cannot be ensured
Solution Approach 1:
The patent replaces conventional mathematical cryptography mechanisms with a physics-based security mechanism utilizing shot noise properties of optical signals. Instead of relying on computational complexity of encryption algorithms, the system uses the inherent physical characteristics of optical signal transmission (shot noise) to provide security. This substitution of mechanical/mathematical encryption with physical layer security mechanisms achieves both security enhancement and relative simplification of the encryption system architecture.
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 provides telesecurity in the physical layer for wireless communication by encrypting the signal with shot noise, making it difficult for third parties to decrypt, even if they intercept the radio wave, thus ensuring secure data transmission.
Implementation Method 1
a light generation unit that generates, as an optical signal, multivalued information in a multivalued state based on predetermined data
Implementation Method 2
an optical-electrical conversion unit that converts the optical signal into an electrical signal
Data Source
AI summary
The present invention addresses the problem of providing a signal process in which a countermeasure against eavesdropping over a physical layer in a wireless communication is performed. An optical signal generation unit 11 generates, as an optical signal, multivalued information that is in a multivalued state and is based on prescribed data. An E/O conversion unit 112 converts the optical signal to an electrical signal. An optical signal amplification unit 12 amplifies the optical signal. An O/E conversion unit 13 converts the optical signal to an electrical signal. A radio wave transmission unit 14 transmits, as a radio wave, the multivalued information converted into the electrical signal. The problem is solved thereby.