研究目的
To propose a new authenticated quantum protocol for controlled secure direct communication based on five-particle Brown states, aiming to enhance quantum channel capacity for transferring secret information under the supervision of a controller.
研究成果
The proposed protocol successfully establishes a secure communication channel under the supervision of a controller, using five-particle Brown states for higher quantum channel capacity. It includes mutual authentication and eavesdropping checks, with the classical XOR operator ensuring secure message transmission. Future work could explore multi-controller scenarios and two-way information transmission.
研究不足
The protocol assumes the controller is honest and its identity is not forgeable by an attacker. The security relies on the pre-shared identities and passwords, and the classical channel is assumed to be secure against manipulation.
1：Experimental Design and Method Selection:
The protocol uses five-particle Brown states as the quantum channel for secure direct communication, incorporating bidirectional authentication and eavesdropping checks.
2：Sample Selection and Data Sources:
The protocol involves the sender (Alice), receiver (Bob), and controller (Charlie), with identities and passwords shared securely.
3：List of Experimental Equipment and Materials:
Quantum channel based on five-particle Brown states, classical XOR operator for encryption, and decoy qubits for eavesdropping checks.
4：Experimental Procedures and Operational Workflow:
The protocol includes steps for communication request production, preparing the channel, establishing the quantum channel with eavesdropping check and authentication, encryption, granting license by the controller, and decryption.
5：Data Analysis Methods:
Error rate calculation for eavesdropping checks and decryption based on measurement results.
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