A description of the TIFF format: A description of the JPEG format: A description of buffer overflow exploits: Now I know there has been exploits in the LibJPEG used for loading jpeg's in some programs, Excel comes to mind. So the thing you will have to do is to maybe finding out how those exploits was done. TIFF is very different that JPEG in structure so a TIFF exploit wby thehof - Ideas, requests