Quantum Blockchains

Dr Mirek Sopek

Time-Bin CKA as a tool for blockchain technology

At Quantum Blockchains, our pursuits extend beyond the daily enhancements of our Quantum Secured Blockchain and Quantum Cryptography Migration System. We are consistently envisioning the horizon of technological advancements. We firmly believe that the realm of quantum information science holds the key to a truly efficient and reliable blockchain consensus protocol.

Our recent publication on ArXiv (https://arxiv.org/abs/2308.16289) delves into the potential of the Time-Bin Conference Key Agreement (TB CKA) protocol as an avenue for achieving consensus among multiple parties.

Our paper elucidates the potential physical implementation using the time-bin entanglement protocol and exemplifies how this procedure can be perceived as a quintessential realization of the global common coin primitive. Following this, we demonstrate how TB CKA can be integrated into classical consensus algorithms, forging hybrid classical-quantum solutions. This innovative approach addresses the Byzantine Agreement challenge, circumventing the well-known blockchain consensus hurdles presented by the FLP impossibility result and Brewer’s CAP theorem.

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