|
| related topics |
| {key, protocol, security} |
| {alice, bob, state} |
| {error, code, errors} |
| {entanglement, phys, rev} |
|
Security of quantum key distribution protocol with two-way classical
communication assisted by one-time pad encryption
Shun Watanabe, Ryutaroh Matsumoto, Tomohiko Uyematsu
abstract: In this paper, we consider a quantum key distribution protocol (QKD) with
two-way classical communication that is assisted by one-time pad encryption. We
propose a two-way preprocessing that uses one-time pad encryption by previously
shared secret key, and the net key rate of the QKD with proposed preprocessing
exceeds the key rate of the QKD without it. The preprocessing is reduced to the
entanglement distillation protocol with two-way classical communication and
previously shared EPR pairs (two-way breeding protocol), and the security of
QKD with the preprocessing is guaranteed in the same way as Shor and Preskill's
arguments.
- oai_identifier:
- oai:arXiv.org:quant-ph/0608030
- categories:
- quant-ph
- comments:
- 12 pages, 2 figure, version 2 corrected typo errors, version 3 added
the analysis of the key rate in the BB84 protocol
- arxiv_id:
- quant-ph/0608030
- created:
- 2006-08-02
- updated:
- 2006-08-29
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