OneTime is an open source encryption program that uses the one-time pad algorithm to allow two parties to communicate securely, without worrying about unauthorized people listening in. OneTime compresses plaintext input to save pad, has features that assist with the bureaucracy of pad management, and comes with built-in help. It is written in the Python programming language and requires a Python interpreter to run.
OneTime was written by Karl Fogel and is in the public domain.
http://www.red-bean.com/onetime/
Ubuntu installation instructions: sudo apt-get install onetime
