Blender is a steganography program that makes it easier to write hidden messages in such a way that no one apart from the intended recipient knows of the existence of the message; this is in contrast to cryptography, where the existence of the message itself is not disguised, but the content is obscured.

The encryption used for storing message data is Rijndael/AES 256-bit with "salt".

Blender Features
Messages are concealed within the lowest bits of noisy images or sound files.
Supports BMP, GIF, TIF, PNG, WAV, MID and .NET Assemblies.