# JPEG steganography

Aside from Jsteg of Derek Upham, Outguess of Neils Provos, and F5 (improvement of F3 and F4) of Pfitzmann and Westfeld, What other methods can you use in information hiding in JPEG images?

The methods I mentioned above hide the message in the DCT coefficients of the image before it is compressed. Are there other component in jpeg which can be used to perform steganography? Pixel values can be used for PNG and BMP images but they cannot be used for JPEG since they change after being compressed.

Thank you.