What is a digital shadow?
We all cast a digital shadow on the Internet. This is the ever-expanding trail of publicly available data and information that we leave behind as we conduct our day-to-day lives.
This shadow may unintentionally expose a person's movements, friends and interests or an organisation's key employees, software versions, network and security settings.
The current epidemic of cyber attacks has seen a long list of victims including Google, Sony and the IMF, each of whom suffered targeted attacks that harnessed this information. Such attacks bypass all traditional defences and can involve data theft, extortion or even physical harm.