As we can see, the blockchain is a distributed database for general use, where there is no central monitoring of the process. Records can be kept, analyzed and recalled as usual with databases. Furthermore, there is the decentralized validation process for transactions within the blockchain. The scope of the blockchain technology is therefore very large, as data management is a very important part in many spheres: banking and insurance, real estate, logistics, public databases (transport, civil office, registry office, electoral registrations and votes, etc.).