Novel Quantum Key Distribution Method Based on Blockchain Technology

Quantum key distribution (QKD) methods, one of the working subjects in the field of quantum technologies, are among the solutions that have great potential and will be used both today and in the post-quantum era. Because it is one of the unique solutions that come to the fore in both true random number generation and key distribution in a secure manner. In addition, quantum attack methods are also being studied against the security of quantum key distribution techniques. There are different suggestions against man-in-the-middle attacks, which is one of the important attack methods. In this study, a protocol consisting of two stages and foreseeing the use of blockchain technology without affecting quantum mechanics is proposed in order to be a solution against attacks such as man-in-the-middle on QKD systems. In the first phase of the protocol, a basic identification capability between quantum devices (parties) is gained using the Hyperledger Fabric permissioned blockchain protocol. In the second stage, the standard QKD reconciliation process for BB84 will be performed. In the study, blockchain technology has been added to the quantum key distribution process in the most optimal way, and both the identification of the parties has been brought to the quantum systems and a viable solution has been proposed against man-in-the-middle attacks.