4,065 research outputs found
Quantum Secure Direct Communication with Mutual Authentication using a Single Basis
In this paper, we propose a new theoretical scheme for quantum secure direct
communication (QSDC) with user authentication. Different from the previous QSDC
protocols, the present protocol uses only one orthogonal basis of single-qubit
states to encode the secret message. Moreover, this is a one-time and one-way
communication protocol, which uses qubits prepared in a randomly chosen
arbitrary basis, to transmit the secret message. We discuss the security of the
proposed protocol against some common attacks and show that no eaves-dropper
can get any information from the quantum and classical channels. We have also
studied the performance of this protocol under realistic device noise. We have
executed the protocol in IBMQ Armonk device and proposed a repetition code
based protection scheme that requires minimal overhead
A Novel Protocol-Authentication Algorithm Ruling Out a Man-in-the-Middle Attack in Quantum Cryptography
In this work we review the security vulnerability of Quantum Cryptography
with respect to "man-in-the-middle attacks" and the standard authentication
methods applied to counteract these attacks. We further propose a modified
authentication algorithm which features higher efficiency with respect to
consumption of mutual secret bits.Comment: 4 pages, submitted to the International Journal of Quantum
Information, Proceedings of the meeting "Foundations of Quantum Information",
Camerino, April 200
Multi-Photon Quantum Key Distribution Based on Double-Lock Encryption
This paper presents a multi-stage, multi-photon quantum key distribution
protocol based on the double-lock cryptography. It exploits the asymmetry in
the detection strategies between the legitimate users and the eavesdropper. The
security analysis of the protocol is presented with coherent states under the
intercept-resend attack, the photon number splitting attack, and the
man-in-the-middle attack. It is found that the mean photon number can be much
larger than one. This complements the recent interest in multi-photon quantum
communication protocols that require a pre-shared key between the legitimate
users
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