Caesar1

The Caesar Cipher is a great place to start with cryptography. With a little practice, you can do it in your head. If you have trouble, be sure to do a bit of searching online. Some people find this cipher easier with a code wheel. Caesar Cipher is pretty simple, since you just shift each letter of the alphabet down a set number of positions. If you know that something is coded in this cipher, you have to try at most 25 possibilities. Or in other words, Caesar is a weak cipher because it is vulnerable to a brute force attack on its 25 possible keys. That is why we don’t use it anymore, other than as a fun diversion.