Quantum Direct Communication with Integrated User Authentication
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Solution Overview
Problem
Existing quantum direct communication techniques rely on quantum entangled states, which are inefficient for practical implementation, and lack integrated user authentication, leading to separate entity authentication methods and insecure communication without pre-shared keys.
Innovation Solution
A quantum direct communication method that performs user authentication using a preset channel verification probability and authentication key, verifying the security of quantum channels and resetting communication when failures occur, enabling secure communication without pre-shared information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If quantum entangled states are used for quantum direct communication, then secure communication can be achieved, but the generation efficiency is very low and implementation is complex
Solution Approach 1:
The patent changes the fundamental parameter of quantum state type from entangled states to single particle states (photons). This parameter change enables the system to achieve secure communication while dramatically improving generation efficiency and simplifying implementation, as single photon sources are much more readily available and easier to generate than entangled photon pairs.
Solution Approach 2:
The patent employs disposable single-photon packets instead of requiring complex entangled state generation. Each communication uses individual photons that can be generated on-demand using conventional light sources and attenuators, eliminating the need for complex entanglement generation apparatus and improving overall system efficiency.
2Adaptability or versatility
If quantum direct communication is performed without pre-shared keys, then the purpose of secure communication is achieved, but user authentication cannot be performed and separate authentication techniques must be adopted
Solution Approach 1:
The patent merges user authentication functionality directly into the quantum direct communication protocol. By integrating authentication checks within the quantum communication framework itself, the system eliminates the need for separate authentication systems while maintaining the ability to perform secure communication without pre-shared keys. This reduces overall system complexity rather than increasing it.
Solution Approach 2:
The quantum communication system is designed to perform multiple functions simultaneously: secure message transmission and user authentication. This multi-functionality is achieved by incorporating authentication verification steps within the quantum protocol, allowing a single system to handle both communication and authentication tasks without requiring separate dedicated systems.
3Reliability
If entity authentication is performed separately from quantum direct communication, then authentication can be achieved, but the system becomes more complex and requires additional authentication techniques
Solution Approach 1:
The patent combines entity authentication with quantum direct communication into a unified protocol. Authentication operations are integrated within the quantum communication flow, eliminating the need for separate authentication systems. This merging reduces device complexity while maintaining reliable entity authentication capabilities.
Data Source
AI summary
A quantum direct communication with user authentication and an apparatus using the same. The quantum direct communication method includes performing verification of security of a quantum channel using a preset channel verification probability and a quantum state source generated by a receiver of quantum direct communication, performing user authentication using one or more of a preset user authentication probability, the quantum state source, and an authentication key shared between the receiver and a sender, stopping quantum direct communication and resetting the quantum channel when the verification of security of the quantum channel fails, and stopping quantum direct communication when the user authentication fails.