In this paper, we generalize a secured direct communication process between N users with
partial and full cooperation of quantum server. So, N− 1 disjointed users u 1, u 2,…, u N− 1 …

The advent of next-generation networks, such as fifth-generation cellular wireless (5G), has
transformed every aspect of our lives and promised improvement for various real-life …

Quantum communication provides an enormous advantage over its classical counterpart:
security of communications based on the very principles of quantum mechanics …

Quantum secure direct communication can transmit a secret message directly through
quantum channels without first generating a shared secret key. In the most of the existing …

Based on Bell states, this paper proposes a semi-quantum protocol enabling the limited
semi-quantum or “classical” user Bob to transmit the secret message to a fully quantum Alice …

A novel quantum key distribution protocol is presented, based on entanglement and dense
coding and allowing asymptotically secure key distribution. Considering the storage time …

A quantum secure direct communication scheme based on single particles is proposed. In
our scheme, we define a new Y-basis which is different from the traditional Z-basis and X …

In this paper we propose a perfect teleportation protocol for certain class of three-qubit
entangled states. The class of states which are teleported, is larger than those considered by …

The first rational quantum secure direct communication scheme is proposed, in which we
use the game theory with incomplete information to model the rational behavior of the …

A novel multiparty controlled bidirectional quantum secure direct communication protocol
combining continuous-variable states with qubit block transmission is proposed. Two …