Time-Bin CKA as a tool for blockchain technology
Marta Misiaszek-Schreyner, Miriam Kosik, Mirek Sopek

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.
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Taxonomy
TopicsElectrochemical Analysis and Applications · Distributed systems and fault tolerance · Advanced Memory and Neural Computing
