# Efficient Deterministic Secure Quantum Communication protocols using multipartite entangled states

## TL;DR

This paper introduces two efficient deterministic secure quantum communication protocols utilizing multipartite entangled states, enhancing security and efficiency in transmitting two or three bits of information through quantum channels.

## Contribution

The paper presents novel DSQC protocols using GHZ-like and Brown states with improved qubit efficiency and secure multipartite teleportation schemes.

## Key findings

- Protocols achieve secure transmission of 2 and 3 bits.
- Enhanced qubit efficiency through channel and basis selection.
- Utilization of multipartite entangled states for secure communication.

## Abstract

We propose two deterministic secure quantum communication (DSQC) protocols employing three-qubit GHZ-like states and five-qubit Brown states as quantum channels for secure transmission of information in units of two bits and three bits using multipartite teleportation schemes developed here. In these schemes, the sender's capability in selecting quantum channels and the measuring bases leads to improved qubit efficiency of the protocols.