In my project Blockchain Decrypted I developed a method how the complex fundamentals of Blockchain can be explained in an intelligible way. The functionality and mathematical backgrounds of the future-oriented Blockchain are presented in an understandable way. Furthermore, an exciting application of the Blockchain, called Smart Contract, is described. An own Smart Contract, which implements a TicTacToe game, has been developed and an own crypto currency has been created and integrated. Thus the most exciting aspects of the Blockchain are demonstrated, the possibilities of the technology are clearly recognizable. Thanks to a webpage-interface, the game is easy to use. My work offers a great opportunity to get to know the dimensions of Blockchain on the basis of a specific example.