National Cyber Security Centre

Critical security issue affecting PHP

Updated: The NCSC is encouraging UK organisations to take immediate action to mitigate a security issue affecting PHP ...
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Post-quantum updates to our TLS guidance

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Disruptive cyber attacks – reducing their impact, reducing the risk

How to prepare people, plans and processes so your organisation can respond and recover effectively. Although organisations should take steps to prevent cyber attacks, there is no guarantee of ...
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Adversary simulation: what you need to know

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UK and allies expose spyware used by Iranian state actors to target dissidents, activists and journalists

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NCSC statement in response to recent incidents resulting from frontier AI evaluations

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UK and Allies urge critical sectors to improve defences against Russian intelligence targeting

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NCSC CEO: Hostile states linked to three-quarters of cyber attacks affecting UK's critical systems

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Passkeys are more secure than traditional ways to log in

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Defending against China-nexus covert networks of compromised devices

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Cross domain approach and architecture

This guidance describes the NCSC’s approach to using cross domain technology and architectures. It helps developers, integrators and risk owners to understand what cross domain is, and how it can be ...