This is a hard one to answer because for some people, in some industries, the answer will be: yes, cyber criminals will be a massive threat to security (it's believed that the National Grid is under attack constantly from cyber criminals and terrorists). But for others, rogue or malicious insiders will be a bigger threat than unknown people in far away places. But neither route is ignored by organisations who value their reputation. The layered approach favoured by GCHQ means that approach is holistic. We recommend a robust and risk-savvy cyber security defence system based on detection rather than prevention. But we recommend a series of IT and data security measures too, as this reinforces the protection and makes life difficult for any cyber attackers who do get inside the perimeter, and it stymies the careless or malicious insider too. And we have a series of digital forensic technologies too, which can prove compliance and track criminal activity.
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