Do dark networks aid cyberthieves and abusers?

The Downing Street summit has thrown the spotlight on the web and what can be done to expunge images of child abuse and to catch those that share such material.

While it is true that abusers seek and share images on the web, many take steps to hide what they are doing because it does such a poor job of protecting their anonymity.

Instead, many tech-savvy paedophiles have turned to so-called "dark nets", such as Tor, I2P, Freenet and many others