In this part we're going to talk about Blockchain Cryptography, that secret sauce that powers this whole concept. Again, we are going to mostly use Bitcoin as reference here.
Blockchain cryptography is in the form of a Secure Hash Algorithm (SHA) to hash addresses and encrypt information. An address is where you store and perform your Blockchain transactions. A Bitcoin address is essentially your wallet where you store, receive and send coins. The Blockchain uses this address to identify you and other person's that you are dealing with.