Unconditional security of practical quantum key distribution

2001/07/03 by Hitoshi Inamori, H. Inamori, Norbert Lütkenhaus +3 · 7 citations
Computer Science · Physics and Astronomy · #Advanced Statistical Modeling Techniques #BB84 #Communication source #Cryptographic protocol #Cryptography #Key (lock) #Protocol (science) #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum cryptography #Quantum key distribution #quant-ph

paper · pdf · doi:10.1140/epjd/e2007-00010-4

published as European Physical Journal D, Vol 41, p.599 (2007) · 47 pages

arxiv created 2001/07/03 · openalex publication_date 2007/01/16 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We present a complete protocol for BB84 quantum key distribution for a realistic setting (noise, loss, multi-photon signals of the source) that covers many of todays experimental implementations. The security of this protocol is shown against an eavesdropper having unrestricted power to manipulate the signals coherently on their path from sender to receiver. The protocol and the security proof take into account the effects concerning the finite size of the generated key.

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• Security loophole in free-space quantum key distribution due to spatial-mode detector-efficiency mismatch
• Entanglement-enhanced quantum key distribution
• On the optimality of individual entangling-probe attacks against BB84 quantum key distribution