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.

Answer 2

I know that you are looking for a no-gem encryption, but still want to offer to those who are here and don't worry about using external gems. Try glogin (I'm the author):

require 'glogin/codec'
codec = GLogin:Codec.new('the secret')
encrypted = codec.encrypt('Hello, world!')
decrypted = codec.decrypt(encrypted)

It's based on OpenSSL and Base58.

Answer 3

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)