Exploring the Quantum Potential of a 5-Qubit Highly Entangled Quantum State

In response to the growing demand for secure cryptographic methods in information security, quantum cryptography has emerged as a promising avenue. This paper introduces a novel quantum cryptography technique utilizing Brown state, a resource proven valuable in various quantum information tasks. The proposed protocol involves three key parties: Alice, Bob, and Charlie, each entrusted with specific bits of the Brown state. These bits are strategically used to enhance security and verify the integrity of transmitted information. The report provides insights into the design, applications, and underlying principles of the proposed technique, emphasizing its potential for future quantum communication systems. The two applications introduced in the work are Quantum key agreement and an Information splitting application both utilizing the designed protocol at its core. Practical guidance on preparing the Brown state using Qiskit is also included.