A technique is devised to perform orthogonal state quantum key distribution. In this scheme,
entangled parts of a quantum information carrier are sent from Alice to Bob through two …

A multi-step quantum secure direct communication protocol using blocks of multi-particle
maximally entangled state is proposed. In this protocol, the particles in a Green–Horne …

A deterministic direct quantum communication protocol is proposed by using swapping
quantum entanglement and local unitary operations. The present protocol is secure for the …

An entanglement-based quantum dialogue protocol [Phys. Lett. A 328 (2004) 6] is proven to
be insecure: that is, in the protocol an eavesdropper can steal the secret messages without …

Nonlocal sets of orthogonal product states (OPSs) are widely used in quantum protocols
owing to their good property. In Phys. Rev. A 101, 062329 (2020), the authors constructed …

The nonlocal set has received wide attention over recent years. Shortly before, Li and Wang
arXiv: 2202.09034 proposed the concept of a locally stable set: The only possible …

We present a general idea to construct methods for multi-qubit quantum teleportation
between two remote parties with control of many agents in the network. Our methods seem …

Recently, much attention have been paid to the constructions of nonlocal multipartite
orthogonal product states. Among the existing results, some are relatively complex in …

Digital signature plays an important role in cryptography. Many quantum digital signature
(QDS) schemes have been proposed up to now since the security of classic digital signature …

This study proposes quantum secret sharing protocols using product states. The first two
protocols adopt the quantum key distribution protocol using product states [Guo Phys. Rev. A …