In today's post I want to cover encryption and decryption of data we have talked about in the previous posts. For example, we wanted to generate a token based on information about the user and the client. So we wanted to do something like Encrypt(UserID + ClientID) = Hash where UserID is a large integer and and Client ID is a regular integer. The original text can therefore be 16 and 8 hexadecimal characters in length which gives us 24 characters. If we want to keep the size of the encrypted text to be the same as the original string, we could choose AES stream encryption. If we were to use stronger algorithms the size would likely bloat.