dorsal/arxiv
View SchemaCoherent Eavesdropping Attacks in Quantum Cryptography: Nonequivalence of Quantum and Classical Key Distillation
| Authors | Dagomir Kaszlikowski, Jenn Yang Lim, Leong Chuang Kwek, Berthold-Georg Englert |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0312172 |
| URL | https://arxiv.org/abs/quant-ph/0312172 |
| DOI | 10.1103/PhysRevA.72.042315 |
| Journal | Physical Review A 72 (2005) 042315 (5 pages) |
Abstract
The security of a cryptographic key that is generated by communication through a noisy quantum channel relies on the ability to distill a shorter secure key sequence from a longer insecure one. We show that -- for protocols that use quantum channels of any dimension and completely characterize them by state tomography -- the noise threshold for classical advantage distillation is substantially lower than the threshold for quantum entanglement distillation because the eavesdropper can perform powerful coherent attacks. The earlier claims that the two noise thresholds are identical, which were based on analyzing incoherent attacks only, are therefore invalid.
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"abstract": "The security of a cryptographic key that is generated by communication\nthrough a noisy quantum channel relies on the ability to distill a shorter\nsecure key sequence from a longer insecure one. We show that -- for protocols\nthat use quantum channels of any dimension and completely characterize them by\nstate tomography -- the noise threshold for classical advantage distillation is\nsubstantially lower than the threshold for quantum entanglement distillation\nbecause the eavesdropper can perform powerful coherent attacks. The earlier\nclaims that the two noise thresholds are identical, which were based on\nanalyzing incoherent attacks only, are therefore invalid.",
"arxiv_id": "quant-ph/0312172",
"authors": [
"Dagomir Kaszlikowski",
"Jenn Yang Lim",
"Leong Chuang Kwek",
"Berthold-Georg Englert"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.72.042315",
"journal_ref": "Physical Review A 72 (2005) 042315 (5 pages)",
"title": "Coherent Eavesdropping Attacks in Quantum Cryptography: Nonequivalence of Quantum and Classical Key Distillation",
"url": "https://arxiv.org/abs/quant-ph/0312172"
},
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