dorsal/arxiv
View SchemaSecurity of Quantum Key Distribution with entangled quNits
| Authors | Thomas Durt, Dagomir Kaszlikowski, Jing-Ling Chen, L. C. Kwek |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0302078 |
| URL | https://arxiv.org/abs/quant-ph/0302078 |
| DOI | 10.1103/PhysRevA.69.032313 |
Abstract
We consider a generalisation of Ekert's entanglement-based quantum cryptographic protocol where qubits are replaced by qu$N$its (i.e., N-dimensional systems). In order to study its robustness against optimal incoherent attacks, we derive the information gained by a potential eavesdropper during a cloning-based individual attack. In doing so, we generalize Cerf's formalism for cloning machines and establish the form of the most general cloning machine that respects all the symmetries of the problem. We obtain an upper bound on the error rate that guarantees the confidentiality of quNit generalisations of the Ekert's protocol for qubits.
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"abstract": "We consider a generalisation of Ekert\u0027s entanglement-based quantum\ncryptographic protocol where qubits are replaced by qu$N$its (i.e.,\nN-dimensional systems). In order to study its robustness against optimal\nincoherent attacks, we derive the information gained by a potential\neavesdropper during a cloning-based individual attack. In doing so, we\ngeneralize Cerf\u0027s formalism for cloning machines and establish the form of the\nmost general cloning machine that respects all the symmetries of the problem.\nWe obtain an upper bound on the error rate that guarantees the confidentiality\nof quNit generalisations of the Ekert\u0027s protocol for qubits.",
"arxiv_id": "quant-ph/0302078",
"authors": [
"Thomas Durt",
"Dagomir Kaszlikowski",
"Jing-Ling Chen",
"L. C. Kwek"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.69.032313",
"title": "Security of Quantum Key Distribution with entangled quNits",
"url": "https://arxiv.org/abs/quant-ph/0302078"
},
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