Simple Encryption in Ruby without external gems

Question

I need a simple encryption for some text strings. I want to create coupon codes and make them look cool so subsequently created code should look very different. (And besides

Answer 1

You can check all different ways of encryption/decryption using ruby in this gist: https://gist.github.com/iufuenza/183a45c601a5c157a5372c5f1cfb9e3e

If you don't want to use a gem, I would totally recommend Openssl as the most secure which is also very easy to implement as it has very good Ruby support.