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

I can recommend you uuencode and uudecode utils you can use them wuth standart ruby function pack:

str = "\007\007\002\abcde"
new_string = [str].pack("u")
original = new_string.unpack("u")

(sample from Hal Fulton's Ruby Way)