On my web site a user enters their credit card details. It is then transmitted with an ssl to the server. What I then want to do is encrypt the data so I can email it to the accounts dept. What I need is an algorithm to encrypt the data. I was going to do this by having a dll on the server to encrypt and an application in accounts to decrypt. Any ideas what I should use. I'm not sure public-private keys are that relevent as the algorithm will only be executed on the server/ local workstation