A small percentage of people do bad things, this is human nature, thieves existed ever since people had things that can be stolen. And today where almost every technology product is connected to the entire world via the internet a lot of those technology products need to be secured against bad people. The first thing security people typically try to do is to detect and block the bad things – this can be spam, viruses and other malware or even more sophisticated attacks. Every detection system by its very nature has two ways it can fail –...