A necessary condition for the security of coherent-one-way quantum key distribution protocol

Mhlambululi Mafu, Adriana Marais, Francesco Petruccione

    Research output: Contribution to journalArticle

    Abstract

    The coherent-one-way and the differential-phase-shift protocols are two of the most recent practical quantum key distribution protocols for quantum cryptography. These protocols belong to a class of so-called distributed-phase-reference quantum key distribution protocols. While security proofs for some limited attacks exist, the unconditional security proofs this class of protocol remain unrealised. The existing tools for proving security of protocols against the most general attacks fail to apply to this class of protocol in a straight forward way. One of the necessary conditions for a quantum key distribution protocol to be secure is the presence of noncommuting measurements. In this paper, the coherent-one-way protocol is formalised, and we describe Bob's measurements by non-commuting POVM elements, showing that this security condition is met.

    Original languageEnglish
    Pages (from-to)2769-2773
    Number of pages5
    JournalApplied Mathematics and Information Sciences
    Volume8
    Issue number6
    DOIs
    Publication statusPublished - 2014

    Fingerprint

    Quantum cryptography
    Quantum Key Distribution
    Necessary Conditions
    Security Proof
    Phase shift
    Unconditional Security
    Attack
    Quantum Cryptography
    Phase Shift
    Straight

    All Science Journal Classification (ASJC) codes

    • Applied Mathematics
    • Numerical Analysis
    • Analysis
    • Computer Science Applications
    • Computational Theory and Mathematics

    Cite this

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    A necessary condition for the security of coherent-one-way quantum key distribution protocol. / Mafu, Mhlambululi; Marais, Adriana; Petruccione, Francesco.

    In: Applied Mathematics and Information Sciences, Vol. 8, No. 6, 2014, p. 2769-2773.

    Research output: Contribution to journalArticle

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