NCSC UK
@NCSC

We are the National Cyber Security Centre – part of the UK’s intelligence & cyber agency @GCHQ. We help to make the UK the safest place to live and work online.

 London, England
ncsc.gov.uk
Joined November 2015
11,073 Photos and videos
Over 20,000 UK organisations are already signed up to free malicious activity notifications from the NCSC.🔔 Early Warning offers potentially invaluable time to detect and respond to cyber incidents on your network before they escalate. Sign up today⬇️ ncsc.gov.uk/section/active-c…
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How can leaders create environments where cyber resilience becomes part of everyday decision-making? The second episode of our two-part special on institutional wilful blindness considers what it takes to turn cyber risk awareness into action⬇️ ncsc.gov.uk/section/cyber-se…
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The NCSC has published a new blog on how defenders can make better use of AI. To read more⬇️ ncsc.gov.uk/blogs/one-does-n…
New blog: One does not simply defend agentically

ALT New blog: One does not simply defend agentically

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Supply chain cyber attacks are rising, yet only a fraction of UK businesses assess these risks. Cyber Essentials significantly reduces exposure to common attacks. For information on how to embed Cyber Essentials within your supply chain ⬇️ ncsc.gov.uk/cyberessentials/…
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Next week! The NCSC Cyber Series Podcast will discuss how leaders can respond to incidents, how to tell stories that encourage people to act, and how people may actually be the strongest link in an organisation's defences. To listen to previous episodes⬇️ ncsc.gov.uk/section/cyber-se…
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Join us for a free, live webinar for small and medium retail businesses to learn practical steps you can take for stronger cyber security. 📅Monday 5th October 2026, 10-11am Sign up now⬇️ events.teams.microsoft.com/e…
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Keeping the British public safe has been my first priority. I called in the CEO and CTO of @NCSC to discuss hardening Britain’s defences in the face of AI cyber risk. Thank you to the @NCSC team for expert guidance on the theme: ncsc.gov.uk/blogs/managing-t…
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Sponsor and exhibitor applications for #CYBERUK27 are now open. Join us in Liverpool to explore our 2027 theme: Securing the AI Era. Read more⬇️ ncsc.gov.uk/sites/default/fi…
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A new advisory exposes Iranian state cyber attackers using malware dubbed CHOSEN BRICK. Our Director of Operations Paul Chichester @0xchich says individuals at risk should follow advice in our new advisory⬇️ ncsc.gov.uk/news/iranian-cyb…
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Today, the NCSC alongside the @FBI and the Dutch AIVD, has published an advisory exposing spyware used by Iranian state actors to target dissidents, activists, and journalists. 1/2
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Individuals at risk are encouraged to follow our advice to detect spear-phishing attempts and defend against malicious activity that collects data from targets. For more information ⬇️2/2 ncsc.gov.uk/news/iranian-cyb…

Iranian cyber targeting of dissidents, activists and journalists

Advisory on CHOSEN BRICK malware, including technical analysis and advice to help individuals and organisations protect themselves.

ncsc.gov.uk
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Passkeys are a faster, simpler and more secure way to sign in and forget the password headaches.🔐 Millions of users will now be able to choose passkeys on GOV.UK One Login for improved security and usability at point of access. @DCMS ncsc.gov.uk/passkeys
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Severe cyber attacks can cause major disruption to systems, data or infrastructure, often with widespread consequences. Operators must build resilience to respond effectively to an environment where cyber threat escalates to ‘severe’. Act now⬇️ ncsc.gov.uk/collection/how-t…
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Don't let unapproved AI use cast a shadow over your organisation’s security. Understanding employees' needs with AI tools will help ensure they can access the benefits securely. Read our new blog on shadow AI here ⬇️ ncsc.gov.uk/blogs/the-hidden…
Use AI at work? Using unapproved apps can put your organisation at risk of breaches and cyber attacks. Read more about shadow AI: NCSC.gov.uk

ALT Use AI at work? Using unapproved apps can put your organisation at risk of breaches and cyber attacks. Read more about shadow AI: NCSC.gov.uk

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Mitigating the threat posed by future quantum computers requires international commitment and coordination today. This week, @ANSSI_FR published a G7-led call to action which supports organisations' transition to a post-quantum future. Act now: cyber.gouv.fr/en/news/post-q…

Post-Quantum Cryptography Transition: ANSSI and Its G7 Partners Rally Public and Private Sectors...

Under France’s 2026 G7 Presidency (PFG7), France's Cybersecurity Agency (ANSSI) has taken the lead in the G7 Cybersecurity Working Group […]

cyber.gouv.fr
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We’re working with @UKSovereignAI to help provide organisations with the evidence they need to make decisions about how to safely deploy AI. We're looking for companies that can test the real-world security & resilience of AI agents. For more⬇️ sovereignai.gov.uk/

UK Sovereign AI Fund | Backing British AI Startups

Britain's sovereign venture fund investing £1M-£20M in AI startups. Get capital, compute (1M GPU hours), fast-track visas, and strategic assets.

sovereignai.gov.uk
Sovereign AI@UKSovereignAI
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We’re changing government procurement and making it easier for British AI startups to work with government. Our challenge based R&D Procurement Scheme is LIVE with the first challenges coming from @ARIA_research, @DefenceHQ, @NCSC and @DHSCgovuk . We’re creating new opportunities for British startups to build and test technology against real-world problems while delivering public benefit. With up to £100m available, this is a new way of working with government. Watch to find out more.
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The NCSC has published an advisory calling on all organisations that use operational technology (OT) to review their security. Network defenders are encouraged to act on the advice to bolster resilience and prepare for severe cyber threats. Read it here: ncsc.gov.uk/news/disruptive-…
Photo of NCSC Director for National Resilience, Jonathon Ellison, alongside a quote: Recent disruptive activity against operational technology makes clear that the threat to UK networks is far from theoretical. It is part of a broader trend in targeting we are seeing across sectors. Our advice is clear: OT devices do not need to be directly exposed to the internet and so we urge organisations to ensure they are not - to limit opportunities for malicious activity. Against the backdrop of growing capability and geopolitical tensions, the urgency with which organisations need to act has never been more acute.

ALT Photo of NCSC Director for National Resilience, Jonathon Ellison, alongside a quote: Recent disruptive activity against operational technology makes clear that the threat to UK networks is far from theoretical. It is part of a broader trend in targeting we are seeing across sectors. Our advice is clear: OT devices do not need to be directly exposed to the internet and so we urge organisations to ensure they are not - to limit opportunities for malicious activity. Against the backdrop of growing capability and geopolitical tensions, the urgency with which organisations need to act has never been more acute.

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If you have been the victim of a data breach, you should stay alert to scammers using phishing messages, emails and calls asking you to click links or share sensitive information. For guidance on what to do if your data has been breached ⬇️ ncsc.gov.uk/guidance/data-br…
Think you've been the victim of a data breach? The NCSC has guidance to help you respond: NCSC.gov.uk/guidance/data-breaches

ALT Think you've been the victim of a data breach? The NCSC has guidance to help you respond: NCSC.gov.uk/guidance/data-breaches

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The NCSC has seen increased targeting of operational technology (OT) systems across multiple sectors globally, including in the UK. Any organisation with internet-exposed OT should read the latest advisory and review their security posture: ncsc.gov.uk/news/disruptive-…

Disruptive cyber activity highlights risk from internet-exposed systems and edge devices

Owners of operational technology encouraged to address avoidable vulnerabilities, and build long-term cyber resilience.

ncsc.gov.uk
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New podcast available: Leadership expert & author @M_Heffernan, Genevieve Liveley, Director of the Research Institute for Sociotechnical Cyber Security, & Kathryn, our Head of Social Sciences explore why organisations struggle to respond to cyber risk⬇️ ncsc.gov.uk/section/cyber-se…
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The first of a two-part special on institutional wilful blindness, this episode discusses culture, behaviours, and how the stories and metaphors we use to talk about cyber security shape the way leaders understand threats, communicate uncertainty and influence decision-making.
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