Quantum Cryptography and Quantum Teleportation

Paul R. Tapster

F. S. Luiz, Gustavo Rigolin

Carlos Cardoso-Isidoro, Francisco Delgado

Abstract A process involving quantum teleportation to teleport a state to two parties in superposition is presented. Then, the process is applied to cryptography. Concretely in this work, we present the process of cryptography authentication using an undefined qubit state and the double quantum teleportation presented previously. Since quantum cryptography protocols are susceptible of eavesdropping, then such a process is considered through an eavesdropper trying to steal the information to supplant the user of authentication in order to quantify certain limits of applicability.

Liu Rong, Pla Uni

Quantum teleportation can realize quantum cryptography communication which can not be deciphered in the physical layer using quantum entangled state.Described characteristics of the quantum entangled state,given out physics gate circuit which can realize quantum entangled;used the quantum circuit,analysised communication model of teleportation,gived out a quantum circuit to realize quantum teleportation base on Bell State which has simpler structure,proved the quantum circuit is feasible,laied the foundations to study quantum cryptography communication further.

Akira Furusawa, Timothy C. Ralph, Ping Koy Lam