At the Black Hat hacker fair in Amsterdam, security researcher Saumil Shah demonstrated how one can hide an exploit code in an image. This makes it possible to circumvent all security warnings issued by browsers. To pull this off, Shah used steganography, which is a well-known technique through which tools can code programme code or files into an existing image without changing the image in a noticeable way. The file’s extension and header also remain the same. However, the security expert went one step further. Normally, a steganography tool that serves as a decoder must be present on the computer, so that the code can be read out from the image.