Time-Bin CKA as a tool for blockchain technology

TL;DR

This paper investigates the use of Time-Bin Conference Key Agreement (TB CKA) as a physical and cryptographic tool for achieving consensus in blockchain systems, proposing hybrid classical-quantum solutions for Byzantine Agreement.

Contribution

It introduces TB CKA as a physical implementation of the common coin primitive and explores its integration into classical consensus algorithms for blockchain.

Findings

TB CKA can serve as a natural realization of the common coin primitive.

Potential for hybrid classical-quantum consensus algorithms.

Framework for implementing TB CKA in blockchain consensus protocols.

Abstract

We explore the potential of Time-Bin Conference Key Agreement (TB CKA) protocol as a means to achieve consensus among multiple parties. We provide an explanation of the underlying physical implementation, i.e. TB CKA fundamentals and illustrate how this process can be seen as a natural realization of the global common coin primitive. Next, we present how TB CKA could be embodied in classical consensus algorithms to create hybrid classical-quantum solutions to the Byzantine Agreement problem.