Integrity of messages is a problem that is as old as messengers. In the old days, people would seal a message, they knew they couldn’t

A long post today, we’ll recap of classic ciphers, look at the history of modern symmetric ciphers. Finally we’ll look at entropy, a way of

Now that we covered asymmetric cryptography and and how RSA works, there’s nothing like working through equations to understand them. So let’s do some practice

We learnt about the basics of cryptography when we learnt about ciphers and secrets. These involve symmetrical cryptography, meaning that the person doing the enciphering

Merkle puzzles are the first publicly recorded example of asymmetric cryptography. It was devised by Ralph Merkle, he was trying to work out a way