The UK government has officially recognised cyber attacks as a "new and growing" danger to the country's economy and infrastructure.
In its newly published National Security Strategy, the UK government has categorise cyber attacks as a Tier 1 threat, ranking it alongside terrorism, natural hazards and major accidents.
Home Secretary Theresa May has acknowledged the need for a strategic approach to counter cyber terrorism and has pledged £500 million in order to do it.
The fear is that synchronised cyber attacks on certain computer networks could paralyse specific areas of the UK's national infrastructure, like power grids, transport or banking systems. Another thing about cyber warfare is that new technology is making it easier and cheaper for perpetrators to carry them out, without the risk of being caught.
Sir Malcolm Rifkind, the chairman of the Intelligence and Security Committee, said in a statement to the BBC: “What we're talking about is terrorists being able to actually use cyber-methods, for example to interrupt the national grid, to prevent proper instructions going to power stations.”