The rapid growth of smart contracts is driven by the development of cryptocurrency. First of all, Ethereum should be noted. It is one of the few platforms that allows you to create your own smart contracts. The main advantages of digital contracts are the absence of the presence of intermediaries. As already mentioned, the absence of intermediaries makes the process much easier and faster. Now there is no need to seek the help of a lawyer. Everything follows pre-written code. All contracts are stored encrypted on the blockchain. The purpose of the system is that no one can change the smart contract or replace data. In addition, secret keys are used for signing, which increase the level of security.