I <i>think</i> that this implements public key encryption for a microblogging service like Twitter. It uses a GPL encryption library but <i>I have not checked the validity of it</i> so:
a) use at your own risk
b) only use if it's permissible in your country
c) can someone check the library and see if it works or not?<p>I wrote the code purely for research and entertainment purposes. The page itself is published without licence or warranty so you can do whatever you like with it.