Please use this identifier to cite or link to this item: http://hdl.handle.net/10497/17297
Title: 
Security of quantum key distributions with entangled qudits
Authors: 
Issue Date: 
2004
Citation: 
Durt, T., Kaszlikowski, D., Chen, J. L., & Kwek, L. C. (2004). Security of quantum key distributions with entangled qudits. Physical Review A, 69(3), 032313.
Abstract: 
We consider a generalization of Ekert's entanglement-based quantum cryptographic protocol where qubits are replaced by N - or d -dimensional systems (qudits). 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 qudit generalizations of the Ekert’s protocol for qubits.
URI: 
ISSN: 
1094-1622 (online)
1050-2947 (print)
Other Identifiers: 
10.1103/PhysRevA.69.032313
Website: 
Appears in Collections:Journal Articles

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