Security of quantum key distribution using d-level systems
量子物理
2009-11-07 v1
摘要
We consider two quantum cryptographic schemes relying on encoding the key into qudits, i.e. quantum states in a d-dimensional Hilbert space. The first cryptosystem uses two mutually unbiased bases (thereby extending the BB84 scheme), while the second exploits all the d+1 available such bases (extending the six-state protocol for qubits). We derive the information gained by a potential eavesdropper applying a cloning-based individual attack, along with an upper bound on the error rate that ensures unconditional security against coherent attacks.
引用
@article{arxiv.quant-ph/0107130,
title = {Security of quantum key distribution using d-level systems},
author = {Nicolas J. Cerf and Mohamed Bourennane and Anders Karlsson and Nicolas Gisin},
journal= {arXiv preprint arXiv:quant-ph/0107130},
year = {2009}
}
备注
4 pages RevTex