The cyberweapon that could take down the Internet

A new cyberweapon could take down the entire Internet – and there's not much that current defences can do to stop it. So say Max Schuchard at the University of Minnesota in Minneapolis and his colleagues, the masterminds who have created the digital ordnance. But thankfully they have no intention of destroying the net just yet. Instead, they are suggesting improvements to its defences.

Schuchard's new attack pits the structure of the Internet against itself. Hundreds of connection points in the net fall offline every minute, but we don't notice because the net routes around them. It can do this because the smaller networks that make up the internet, known as autonomous systems, communicate with each other through routers. When a communication path changes, nearby routers inform their neighbours through a system known as the border gateway protocol (BGP). These routers inform other neighbours in turn, eventually spreading knowledge of the new path throughout the Internet.

A previously discovered method of attack, dubbed ZMW – after its three creators Zhang, Mao and Wang, researchers in the US who came up with their version four years ago – disrupts the connection between two routers by interfering with BGP to make it appear that the link is offline. Schuchard and colleagues worked out how to spread this disruption to the entire internet and simulated its effects.

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