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arXiv:quant-ph/0312128 · Physical Review A

Quantum dense key distribution

Ivo Pietro Degiovanni, Ivano Ruo Berchera, Stefania Castelletto, Maria Luisa Rastello, Fabio Antonio Bovino, A.M. Colla, Giuseppe Castagnoli

Published Mar 16, 2004• 53 citations
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Abstract

This paper proposes a protocol for quantum dense key distribution. This protocol embeds the benefits of a quantum dense coding and a quantum key distribution and is able to generate shared secret keys four times more efficiently than the Bennet-Brassard 1984 protocol. We hereinafter prove the security of this scheme against individual eavesdropping attacks, and we present preliminary experimental results, showing its feasibility.

DOI
10.1103/physreva.69.032310

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This paper proposes a protocol for quantum dense key distribution. This protocol embeds the benefits of a quantum dense coding and a quantum key distribution and is able to generate shared secret keys four times more efficiently than the Bennet-Brassard 1984 protocol. We hereinafter prove the security of this scheme against individual eavesdropping attacks, and we present preliminary experimental results, showing its feasibility.
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Built based on the fundamental principles of quantum mechanics, Quantum Key Distribution (QKD) enables secure communication for distant parties. Entanglement-based protocols are a type of QKD protocol that uses the phenomenon of entanglement for detecting eavesdroppers between two communicating parties. In this paper, a novel QKD protocol is devised that uses the concept of superdense coding and padding bits to share the one-time pad, i.e., the key. The super dense coding is achieved by sharing a pre-existing entangled pair of qubits by leveraging the beautiful property of entanglement. The communicating parties can share a one-time pad using this protocol securely. This paper will demonstrate this phenomenon using the proposed protocol by showing the experimental results which has been surfaced with IBM Qiskit simulator, and the simulation establishes the applicability of the protocol and shows its effectiveness in detecting eavesdropping attempts while being simple to implement.
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.
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