Seminário de Computação e Informação Quântica 

27/02/2009, 15:00 — 16:00 — Sala P4.35, Pavilhão de Matemática
José Cláudio do Nascimento, U Fortaleza

Quantum identification system over a private quantum channel

All proposals for quantum key distribution require that the parties have access to an authenticated channel. Therefore, a key pre-distribution system is needed to provide authentication for the users. In this paper we propose an efficient scheme for key pre-distribution and identification for users with quantum channel. Our proposal uses quantum one-time-pad for implementing a quantum private channel. The quantum identification scheme proposed requires eight times less qubits than the trivial schemed used in other QKD, and moreover, the network initialization with n users requires only O(n) keys.