Wireless Terminal Space-Time Synchronization via Phase Measurement
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Solution Overview
Problem
Current methods for securing wireless communication in IoT devices using wireless two-way interferometry (Wi-Wi) are complex and require significant infrastructure investment, especially when employing cryptographic techniques like common key cryptography, public key cryptography, or quantum key distribution, leading to increased effort and cost.
Innovation Solution
A wireless communication system that performs space-time synchronization between terminals by measuring and reporting reception phases, adding a phase shift (Δφ) to the measured phases, and using noise addition to enhance security, allowing for secure communication without the need for extensive infrastructure or complex key management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cryptographic techniques (common key cryptography, public key cryptography, quantum key distribution) are used to secure wireless communication, then security of information is improved, but infrastructure investment and system complexity increase significantly
Solution Approach 1:
The patent replaces complex cryptographic infrastructure (mechanical/system-level solution) with a physics-based measurement system using wireless two-way interferometry. Instead of relying on key management systems, quantum key distribution infrastructure, or dedicated security hardware, the invention uses phase measurement and time difference of arrival techniques to inherently secure communication through physical law-based authentication.
Solution Approach 2:
The system performs self-authentication through mutual phase measurement between terminals. Each terminal measures the phase of signals from the other terminal and uses these measurements to verify identity and establish secure communication without requiring external key distribution infrastructure or third-party authentication services.
2Reliability
If cryptographic techniques are used to secure wireless communication, then security of information is improved, but key management effort and cost increase
Solution Approach 1:
The terminals automatically perform phase measurement and authentication without requiring manual key configuration. The system uses the physical characteristics of wireless signal propagation (phase, time of arrival) to automatically establish secure communication, eliminating the need for users to generate, distribute, or manage cryptographic keys.
Solution Approach 2:
The patent replaces manual key management processes with automated phase-based authentication. Instead of requiring users to set and manage cryptographic keys, the system uses physics-based measurements of signal phase and propagation time to automatically verify terminal identities and establish secure communication channels.
3Reliability
If quantum key distribution is used to secure wireless communication, then security of information is improved, but infrastructure development time and cost increase
Solution Approach 1:
The patent replaces quantum key distribution infrastructure with a classical wireless measurement system. Instead of requiring quantum-entangled photon sources, single-photon detectors, or quantum channel infrastructure, the invention uses standard wireless communication hardware to measure phase and time of arrival of signals, achieving security through physics-based authentication that can be implemented with existing technology.
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 the security of wireless communication in a cost-effective and simple manner, suitable for widespread adoption with IoT devices, by leveraging phase shifts and noise addition to secure communication without the need for extensive infrastructure or complex key management.
Implementation Method 1
The first terminal measures a reception phase φAA of a signal that the first terminal itself has transmitted, and a reception phase φBA of a signal that the second terminal has transmitted
Data Source
AI summary
In performing wireless communication between terminals to perform time difference measurement and propagation time measurement, first and second terminals that transmit a signal at least once in attempting space-time synchronization are included. The first terminal measures a reception phase of a locally transmitted signal, and a reception phase of a signal transmitted by the second terminal, adds a positive or negative phase to the measured reception phase, and makes a report to the second terminal. The second terminal measures a reception phase of a locally transmitted signal, and a reception phase of a signal transmitted by the first terminal, and makes a report to the first terminal. The first and second terminals obtain a time difference or propagation time according to a reception phase measured by a local device and reported from a counterpart, and obtain additional information based on a phase reflected in the time difference or propagation time.