!Stealth provides 'plausible deniability' by combining strong encryption with steganography.
!Stealth enables you to store a number of encrypted directories inside a container file, each with its own unique passphrase. The program is designed so that no one without a knowledge of the passphrases can determine how many encrypted directories actually exist. A particular directory can be decrypted only by entering the correct passphrase. If any authorities ever demand access to your encrypted data, you can safely reveal one or more of your less important hidden directories, while denying that any others exist without fear that they can ever be detected.