|
| related topics |
| {key, protocol, security} |
| {alice, bob, state} |
| {error, code, errors} |
| {state, phys, rev} |
| {information, entropy, channel} |
| {vol, operators, histories} |
| {qubit, qubits, gate} |
| {theory, mechanics, state} |
| {photon, photons, single} |
| {particle, mechanics, theory} |
| {measurement, state, measurements} |
| {algorithm, log, probability} |
| {observables, space, algebra} |
| {bell, inequality, local} |
|
Unconditional Security Of Quantum Key Distribution Over Arbitrarily Long
Distances
Hoi-Kwong Lo, H. F. Chau
abstract: Quantum key distribution is widely thought to offer unconditional security in
communication between two users. Unfortunately, a widely accepted proof of its
security in the presence of source, device and channel noises has been missing.
This long-standing problem is solved here by showing that, given fault-tolerant
quantum computers, quantum key distribution over an arbitrarily long distance
of a realistic noisy channel can be made unconditionally secure. The proof is
reduced from a noisy quantum scheme to a noiseless quantum scheme and then from
a noiseless quantum scheme to a noiseless classical scheme, which can then be
tackled by classical probability theory.
- oai_identifier:
- oai:arXiv.org:quant-ph/9803006
- categories:
- quant-ph
- comments:
- This reprint version contains the same material as the one published
in Science 283, 2050-2056 (1999). We also include the refereed supplementary
Notes (as in http://www.sciencemag.org/feature/data/984035.shl) explicitly in
the appendix for easy reference
- doi:
- 10.1126/science.283.5410.2050
- arxiv_id:
- quant-ph/9803006
- journal_ref:
- Science 283 (1999) 2050-2056
- created:
- 1998-03-02
- updated:
- 1999-12-06
Full article ▸
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