Press E to encrypt the data. Press D to decrypt the data. What data? By default, it is your username, but if you press space, you can change it to anything. You can copy/paste that data and using the UP arrow put in the encrypted data to decrypt. No capital letters, working on trying to fix that. The characters usable are: 0; 1; 2; 3; 4; 5; 6; 7; 8; 9; 0; _; -; ?; .; !; @; #; $; %; ^; &; *; (; ); :; ;; <; >; /; and the alphabet (in lower case) There is NO unicode support, too much work and reconfiguration required ¯\_(ツ)_/¯