The public-key encryption method makes it possible to ensure the integrity of my data without having to give my private key to a large number of people. But how do you know if the information we receive from someone is really sent by that person? This is done by the PGP encryption system, where the

Perhaps you already know that with the Bitcoin network, the security of the system is guaranteed by the mining process. So-called "miners" check all transactions and finally write the blocks in the block chain. About every 10 minutes such a block is produced. As a reward for the computationally intensive work, the miners receive a