[WM]: Help with the GIF file format

["Chad W. Davis" <chad.davis@backbonesecurity.com>]

I always thought that the terminating bytes for a GIF file were 00 3B.
However, I have found more often than not that a GIF file may contain many instances of 00 3B before these terminating bytes.  Is
there a more reliable way to find the size of the image and where the true end-of-image indicator lies?  

 

My reason for asking this is: what if information (like steganography) is appended past the end-of-image indicator?  How can you
determine this if there are many instances of 00 3B? 

 

Thank you for any assistance you may provide!

 

Chad W. Davis


______________________________________________________________________________

Watermarking Mailing List - http://www.watermarkingworld.org/ml.html
To unsubscribe send email to "majordomo@watermarkingworld.org" with
"unsubscribe watermarking YOURMAIL" in the body.
______________________________________________________________________________