BOLTLOCK is a powerful, small, relatively fast and compact command line encryption tool. Quickly, from the command line, encode or decode ascii or binary files using a password chosen by you. BOLTLOCK 3.0 beta now supports STENOGRAPHY capabilites. You can add or extract messages, files, or programs from gif and jpeg image files (other image file types may also be compatible). The best part: it's free of course! BOLTLOCK encrypted files are very resilient and much effort must be taken to even make a bruteforce attack possible .