Scientific article
Open access

Security of Quantum Key Distribution Using d-Level Systems

Published inPhysical review letters, vol. 88, no. 12
Publication date2002

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.

Citation (ISO format)
CERF, Nicolas J. et al. Security of Quantum Key Distribution Using <em>d</em>-Level Systems. In: Physical review letters, 2002, vol. 88, n° 12. doi: 10.1103/PhysRevLett.88.127902
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Article (Published version)
ISSN of the journal0031-9007

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