A Simplified Hierarchical Dynamic Quantum Secret Sharing Protocol with Added Features

TL;DR

This paper introduces a simplified hierarchical dynamic quantum secret sharing protocol that can be implemented with existing quantum communication methods, ensuring security, efficiency, and experimental feasibility.

Contribution

It proposes a new simplified HDQSS protocol adaptable to various quantum communication schemes, with security analysis and potential for experimental realization.

Findings

Protocol can be implemented with existing quantum protocols.

Security against eavesdropping and collusion is established.

Potential for experimental realization using various quantum states.

Abstract

Generalizing the notion of dynamic quantum secret sharing (DQSS), a simplified protocol for hierarchical dynamic quantum secret sharing (HDQSS) is proposed and it is shown that the protocol can be implemented using any existing protocol of quantum key distribution, quantum key agreement or secure direct quantum communication. The security of this proposed protocol against eavesdropping and collusion attacks is discussed with specific attention towards the issues related to the composability of the subprotocols that constitute the proposed protocol. The security and qubit efficiency of the proposed protocol is also compared with that of other existing protocols of DQSS. Further, it is shown that it is possible to design a semi-quantum protocol of HDQSS and in principle, the protocols of HDQSS can be implemented using any quantum state. It is also noted that the completely orthogonal-state-based realization of HDQSS protocol is possible and that HDQSS can be experimentally realized using a large number of alternative approaches.