Secure quantum carriers for quantum state sharing

TL;DR

This paper introduces the concept of quantum carriers that securely facilitate various quantum communication tasks, ensuring message privacy and proper access control among multiple parties.

Contribution

It presents a novel quantum carrier framework enabling secure uploading, downloading, and sharing of messages in quantum networks with detailed security analysis.

Findings

Quantum carriers can securely hide messages during transit.

Only authorized subsets can access shared secrets.

The protocol requires collaboration of all parties for operation.

Abstract

We develop the concept of quantum carrier and show that messages can be uploaded and downloaded from this carrier and while in transit, these messages are hidden from external agents. We explain in detail the working of the quantum carrier for different communication tasks, including quantum key distribution, classical secret and quantum state sharing among a set of $n$ players according to general threshold schemes. The security of the protocol is discussed and it is shown that only the legitimate subsets can retrieve the secret messages, the collaboration of all the parties is needed for the continuous running of the protocol and maintaining the carrier.