What is Node?

You get the amount of money in your bank account, the information about the money transfers you look at on your phone, how much money you sent to whom or how much money you received from whom, that is, the data (Data) regarding these transfers or amounts, from the bank's database. The device you have does not download the information of these data (transfers) to your device. It reflects the data in the bank to you. Therefore, you “trust” this database of the bank. In case of a change in this database in the bank, for example a hack or mistake that will write one zero less instead of 10,000 TL, you will now have 1,000 TL. You call the bank and ask for this to be corrected, and in order not to undermine its reliability, the bank makes this correction in its database and your balance is corrected. Here you trust the bank and that's why everyone looks for a safe bank. Because no one wants to waste their money. In this example, the security of the bank is measured by the protection of this “database”.