One such hack is Stegosploit ... that represent the code among the least-significant bits in either a JPG or PNG image. OK, so the exploit code is hidden in the picture. Reading it out is actually ...

So how exactly did [David Buchanan] generate that beautiful PNG, which does in fact md5sum to the value in the image? Very cleverly ... is a meet-in-the-middle hack, where 36 pairs of MD5 ...