reddyonrails / rotx

ROT-X : Encryption/Decryption ROT-X allows you to encrypt plain text. "X" refers to a variable number of letters to shift. The most famous is ROT13, in which each letter is shifted halfway through the alphabet.

Rotx

A rotational cipher, ROT(X), is an ancient enocoding that, given a message, returns a message where each letter has been replaced by the letter exactly X letters after it in the alphabet ordering. Letters near the end of the alphabet wrap around. For example, the translation table for ROT(13) looks like:

ABCDEFGHIJKLMNOPQRSTUVWXYZ
NOPQRSTUVWXYZABCDEFGHIJKLM

and therefore the message HELLO becomes URYYB

Installation

Add this line to your application's Gemfile:

gem 'rotx'

And then execute:

$ bundle

Or install it yourself as:

$ gem install rotx

Usage

rotx 10, 'Reddy, OnRails'
# => "Bonni, YxBksvc"
rotx 10, 'Bonni, YxBksvc', false #encrypt=false
# => "Reddy, OnRails"

# Rotation numbers greater than 26 should work as well
rotx 36, 'Reddy, OnRails'
# => "Bonni, YxBksvc"

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request