It would be fun to make a encryptation keyboard. A keyboard that add the text you write to a buffer, and wen the buffer is full, output it to the computer encrypted. Maybe with pgp. Such machine would probably need a led with the text you are writing.
That way, you coud be using Google Docs or Office 365. And the computer OS can have a keylogger and a backdoor. And you will still be somewhat safe if pgp provide you with strong enough level of encryptation. -- -- ℱin del ℳensaje.