We present a quantum key distribution protocol based on four-level particle entanglement. Furthermore, a controlled quantum key distribution protocol is proposed using three four-level particles. We show that the two protocols are secure.
In order to improve the key generation rate of the quantum key distribution protocols,a perfect complete orthogonal basis of the bipartite three-level system was constructed.By using this basis and swapping the entanglement between the particles,a quantum key distribution protocol was presented.Therefore,a three-level can be generalized to multi-level.Using entanglement swapping between the particles and multi-level key distribution,it can significantly improve the efficiency of the detection of eavesdropping and the key generation rate and the information flux.
Quantum entanglement presents a unique opportunity for secure communication due to its fundamental properties. This paper explores the potential of leveraging this entanglement for quantum key distribution (QKD) protocols. We propose a novel protocol that exploits the self-related properties of entangled particles to guarantee key security. This work details the design of a QKD protocol centered around this self-correlation, aiming to improve key distribution security and efficiency. The paper presents a comprehensive overview of the protocol's design, mathematical foundations, and potential benefits.
A new scheme of Quantum Key Distribution is proposed using three entangled particles in a GHZ state. Alice holds a 3-particle source and sends two particles to Bob, keeping one with herself. Bob uses one particle to generate a secure key, and the other to generate a master-key. This scheme should prove to be harder to break in non-ideal situations as compared to the standard protocols BB84 and Eckert. The scheme uses the concept of Quantum Disentanglement Eraser. Extension to multi-partite scheme has also been investigated.
In this paper, we investigate properties of some multi-particle entangled states and, from the properties applying the secret sharing present a new type of quantum key distribution protocols as generalization of quantum key distribution between two persons. In the protocols each group can retrieve the secure key string, only if all members in each group should cooperate with one another. We also show that the protocols are secure against an external eavesdropper using the intercept/resend strategy.