OpenPuff is a professional software for steganography and watermarking with support for images, audio, video, Adobe and Flash. Its user-friendly interface and resources make it easy to utilize. More information can be accessed on OpenPuff's website, including a FAQ section.

One of the standout features of OpenPuff is its carrier chains, which can hide up to 256Mb of hidden data. Users also have control over the selection level of carrier bits, adding an extra layer of security.
OpenPuff utilizes modern multi-cryptography with 16 algorithms and multi-layered data obfuscation with three passwords. And, to prevent against Chi-squared steganalysis, OpenPuff has built-in resistance measures.
For those concerned about security, OpenPuff offers layers of protection including 256bit+256bit symmetric-key cryptography with KDF4 password extension, 256bit symmetric key data scrambling, and data whitening based on CSPRNG noise mixing. Additionally, OpenPuff offers adaptive non-linear carrier bit encoding.
OpenPuff supports a variety of carrier formats, including images, audio, video, and Flash-Adobe files. Best of all, OpenPuff is a portable and stealth software with native portable structure and no installation or registry keys. Plus, with support for up to 16 CPUs, users can expect faster processing times.
Finally, OpenPuff is freeware, spyware/adware-free, and fully redistributable. Plus, with an OpenSource core crypto-library (libObfuscate), users can trust that their information is in good hands. Give OpenPuff a try and see for yourself why it's a top tier steganography tool.
Version 4.01: Improved data support, security fixes, Linux support