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International Conference on Networking and Digital Society (ICNDS)

Quantum Determined Key Distribution Scheme Using the Bell Measurement

Xiaoyu Li, Dexi Zhang

Published May 1, 2009• 2 citations
Publisher

Abstract

In this paper we provide a quantum determined key distribution scheme. Unlike the previous schemes which produce a random string in the key distribution process as the key, in our scheme the two parties can share a predetermined binary string as the key with shared entangled states and performing CNOT operation and the Bell state measurement. The principles of quantum mechanics guarantees that no other people can get the key. So the scheme is unconditionally secure.

DOI
10.1109/icnds.2009.13

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In this paper we provide a quantum determined key distribution scheme. Unlike the previous schemes which produce a random string in the key distribution process as the key, in our scheme the two parties can share a predetermined binary string as the key with shared entangled states and performing CNOT operation and the Bell state measurement. The principles of quantum mechanics guarantees that no other people can get the key. So the scheme is unconditionally secure.
In order to improve the security and efficiency of quantum key distribution protocol,a protocol was proposed based on entanglement swapping.The two parties of communication establish the key by performing the Bell state measurement.No other people can get the key without being found.Different from the proposed protocol,the Bell measurement of any two Bell states can be realized to achieve the purpose of quantum key distribution.It does not need multi-particle entangled state but only EPR pair to realize the protocol.Analysis results showed that this protocol not only ensures the security of the quantum key shared information,but also uses the entanglement states of two photons without unitary operation. And the protocol is simple and efficient.
This paper proposes a novel distributed key generation scheme based on quantum entanglement, aiming to achieve fully secure key distribution without prior key exchange. The core concept leverages quantum entanglement between two or more nodes to generate and transmit keys, combined with a quantum key distribution protocol for verification and error correction. Unlike existing quantum key distribution schemes reliant on quantum communication channels, this approach offers a theoretically more secure and potentially efficient method for key sharing. The system utilizes Bell states, polarization measurements, and post-processing techniques to establish a shared key. We outline the key components of the system, including entanglement generation, measurement protocols, error correction, and key distillation. The theoretical analysis demonstrates the security of the scheme against eavesdropping attacks, assuming the validity of quantum mechanics. This work contributes to the ongoing research in quantum cryptography and provides a foundational design for a future generation of secure communication networks.
Quantum cryptography is based on quantum mechanics to guarantee secure communication.It allows two parties to produce a shared random bit string known only to them.These random bits can be used as a key to encrypt and decrypt messages.The most important and unique property of quantum cryptography is the ability of the two communicating users to detect the presence of any third party trying to gain knowledge of the key.It is based on fundamental aspects of quantum mechanics.By using quantum entanglement or quantum super positions and transmitting information in quantum states, a communication system can be implemented which detects eavesdropping.Quantum cryptography is used to produce and distribute a key, not to transmit any message data.This key along with certain encryption algorithm, is used to encrypt (and decrypt) a message, which can then be transmitted over a standard communication channel.This paper concentrates on comparison between classical and quantum cryptography as well as survey on various quantum key distribution protocols used to generate and distribute the key among communicating parties.