Analysis of the protection granted to blockchain in the operation of the task of the byzantine generals (byzantine fault tolerance (BFT), byzantine agreement problem, byzantine generals problem)

Abstract

This article discusses a security analysis provided by blockchain technology. The importance of distributed ledger when communicating in equitable distributed networks. This situation can be expressed in the abstract from the point of view of a group of generals from the Byzantine army, stationed at a camp with their troops around an enemy fortress. By communicating only through communications, the generals must agree on a common battle plan. However, one or more of them can be traitors who will try to confuse others. Mathematically, the algorithm is proven to ensure that loyal generals reach an agreement. The byzantine generals' problem is analysed, Byzantine fault tolerance (BFT) and Byzantine agreement problem. Mathematically, the theorem of reaching consensus with M number of compromised nodes is demonstrated while maintaining an acceptable level of Byzantine fault tolerance (BFT).The results of the article can be used practically when constructing a blockchain for exchange of messages in VANET, also in the MQTT data transfer protocol in IoT.