dorsal/arxiv
View SchemaKey Disclosing in Multiphotons with Quantum Cloning
| Authors | Tsuyoshi Nishioka, Toshio Hasegawa, Hirokazu Ishizuka |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0305136 |
| URL | https://arxiv.org/abs/quant-ph/0305136 |
Abstract
Multiphoton state in quantum cryptography decreases its security. Key disclosing with universal quantum cloning machine (UQCM) is considered in explicit manner. Although UQCM cannot make perfect clones, there is some invariant quantity between the original photon and the imperfect clones. The invariant quantity, the direction of Stokes parameters, tells us the auxiliary information leading into key information. The attack, then, corresponds to some kind of quantum non-demolition measurement. Its application to recent high-performance quantum cryptography, Y-00 protocol, is also studied.
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"abstract": "Multiphoton state in quantum cryptography decreases its security. Key\ndisclosing with universal quantum cloning machine (UQCM) is considered in\nexplicit manner. Although UQCM cannot make perfect clones, there is some\ninvariant quantity between the original photon and the imperfect clones. The\ninvariant quantity, the direction of Stokes parameters, tells us the auxiliary\ninformation leading into key information. The attack, then, corresponds to some\nkind of quantum non-demolition measurement. Its application to recent\nhigh-performance quantum cryptography, Y-00 protocol, is also studied.",
"arxiv_id": "quant-ph/0305136",
"authors": [
"Tsuyoshi Nishioka",
"Toshio Hasegawa",
"Hirokazu Ishizuka"
],
"categories": [
"quant-ph"
],
"title": "Key Disclosing in Multiphotons with Quantum Cloning",
"url": "https://arxiv.org/abs/quant-ph/0305136"
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