$ git clone https://github.com/sadasystems/secretmessage
$ cd secretmessage
$ npm install

$ node encrypt_message.js <github username> plain/<message text file> > secret/secret_message.out
$ git add secret_message.out
$ git commit -m "hey @github-user, accept this pull request with a secret message just for you!"
$ git push remote master

$ node hello.js secret/secret_message.out
Decrypt your message.  I'm not stealing your private key, promise, read the code!

 ~/.ssh/id_rsa pass phrase: <enter passphrase>

   -------

     magic secret message just for you appears here!