"Cryptojacking" or why my browser decided to start mining cryptocurrencies without my wish?

With the rise of blockchain technology the rise of "cryptojackers" came along who use your computer power to increase their digital wallets. Without your knowledge and without saying thank you to you. How do they do it and how to protect from it? With this presentation I will explain how mining works and how not to fall in this digital exploitation traps. Everything with fun and simple examples.