Paranoia Text Encryption Lite (free version) for iOS

Paranoia Text Encryption is the universal text encryption application for iOS (iPhone/iPad/iPod) by Paranoia Works. Just copy and paste to and from your favorite applications or save to a file for later use. The app provides real security as data is encrypted using strong encryption algorithms: Blowfish 448 bits, AES 256 bits, RC6 256 bits, Serpent 256 bits, Twofish 256 bits, and GOST 256 bits ciphers are available. A free cross-platform desktop version (Mac OS X, Windows, Linux, ...) and an online (web-based) version (AES, client-side JavaScript) is available on the app's homepage (download section).