A novel quantum key distribution protocol using entanglement is presented. In this protocol, the stream of qubits is divided up into a sequence of qubit pairs. It is shown that by entangling the qubits in each qubit pair ...

A quantum protocol for secure transmission of data using

qubits is presented. This protocol sends one qubit in a

round-trip to transmit one bit of data. The protocol offers

an improvement over the BB84 ...