I'd like to see Whisperpush integrated into Paranoid Android. Whisperpush allows you to send encrypted texts to other Whishperpush and TextSecure users while using any SMS application of your choice.
--pasted from a Blog entry at cyanogenmod.orgsystem-wide secure messaging integration with compatibility with TextSecure. For those unfamiliar, TextSecure is an open-source cross-platform (iOS and Android) client that encrypts your SMS messages both locally, and over the air when sending to other TextSecure users. The application is maintained by Open WhisperSystems, and lead engineer Moxie Marlinspike.