Simple security proof of quantum key distribution based on complementarity

By Masato Koashi. 2009

270 citations recorded by the source corpus.

We present an approach to the unconditional security of quantum key distribution protocols based on a complementarity argument. The approach is applicable to, but not limited to, every case that has been treated via the argument by Shor and Preskill based on entanglement distillation, with a benefit of decoupling of the error correction from the privacy amplification. It can also treat cases with uncharacterized apparatuses. We derive a secure key rate for the Bennett–Brassard-1984 protocol with an arbitrary source characterized only by a single parameter representing the basis dependence.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/5f7f45a77f17a2218152e156cf4ef2da51b47b31

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In Artificial Intelligence

In Atomic and Molecular Physics, and Optics

Citations in the corpus

Secure quantum key distribution with realistic devices (2020, methodology): “(9) In literature, fidelity is widely used for security parameter quantification in QKD security proofs (Koashi, 2009; Lo and Chau, 1999; Shor and Preskill, 2000).”
Entropic uncertainty relations—a survey (2009, background): “…play an important role in our understanding of quantum mechanics, and have interesting applications ranging from quantum cryptography (Damgaard et al., 2005; Koashi, 2005), information locking (DiVincenzo et al., 2004) to the question of separability (Guehne, 2004), very little is known about them.”