Quantum-enhanced Logic-based Blockchain I: Quantum Honest-success Byzantine Agreement and Qulogicoin
This work addresses security and efficiency issues in blockchain for users needing quantum protection, though it appears incremental by integrating quantum elements into existing blockchain structures.
The authors tackled the problem of enhancing blockchain efficiency and security by proposing a quantum-enhanced logic-based framework, resulting in a new cryptocurrency called qulogicoin that can be implemented with current technology and overcomes limitations in quantum cryptographic protocols.
We proposed a framework of quantum-enhanced logic-based blockchain, which improves the efficiency and power of quantum-secured blockchain. The efficiency is improved by using a new quantum honest-success Byzantine agreement protocol to replace the classical Byzantine agreement protocol, while the power is improved by incorporating quantum protection and quantum certificate into the syntax of transactions. Our quantum-secured logic-based blockchain can already be implemented by the current technology. The cryptocurrency created and transferred in our blockchain is called qulogicoin. Incorporating quantum protection and quantum certificates into blockchain makes it possible to use blockchain to overcome the limitations of some quantum cryptographic protocols. As an illustration, we show that a significant shortcoming of cheat-sensitive quantum bit commitment protocols can be overcome with the help of our blockchain and qulogicoin.