OpenPuff – Professional Steganography Tool
http://embeddedsw.net/OpenPuff_Steganography_Home.html

OpenPuff is a professional steganography tool, with unique features you won’t find among any other free or commercial software. OpenPuff is 100% free and suitable for highly sensitive data covert transmission. Features include: a) •Carrier chains : Data is split among many carriers. Only the correct carrier sequence enables unhiding. Moreover, up to 256Mb can be hidden, if you have enough carriers at disposal. Last carrier will be filled with random bits in order to make it undistinguishable from others; b) Supported formats : Images, audios, videos, flash, adobe; and c) Layers of security : Data, before carrier injection, is encrypted (1), scrambled (2), whitened (3) and encoded (4). This will be added to Privacy Resources Subject Tracer™ Information Blog.