Here are a couple of neat iOS applications for the paranoid (kidding!) & security inclined. iPGMail iPGMail (currently $1.99 on the App Store) is the best OpenPGP application I’ve tried on Apple’s platform. Even within the somewhat restrictive limitations that Apple has created for application developers this particular application does everything it can to be user friendly. I would highly recommend this to anyone that wishes to send signed/encrypted e-mail from their iOS device.