GCHQ
@GCHQ

The UK's intelligence, security and cyber agency, helping to keep the UK safe online and in the real world. Follow the cyber security arm of our mission @NCSC.

 United Kingdom
gchq.gov.uk
Joined January 2016
6,936 Photos and videos
GCHQ retweeted
NCSC UK
@NCSC
Oct 21
The NCSC has issued an update to the PHP alert reflecting the release of mitigations. We encourage UK organisations to take immediate action. For more information on the issue as well as our guidance, head to⬇️ ncsc.gov.uk/news/critical-se…
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The National Language Competition (NLC) is a virtual competition for teams of 13-14 year olds from around the UK to compete against each other to solve language-based challenges. 📆 This year, the #NLC2026 runs from 16-20 November. For more info ⬇️ gchq.gov.uk/information/nati…
A graphic for the National Language Competition by GCHQ. Includes a pink puzzle piece with "NLC" on it and an orange speech bubble with "GCHQ." Text reads: "The NLC is back for 2026! Registration is now open #NLC2026." The border is purple.

ALT A graphic for the National Language Competition by GCHQ. Includes a pink puzzle piece with "NLC" on it and an orange speech bubble with "GCHQ." Text reads: "The NLC is back for 2026! Registration is now open #NLC2026." The border is purple.

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🧠 Ready to give your brain a workout? This week’s #GCHQPuzzle is here. Think you know the answer? Tell us in the comments! 👇
Puzzle image titled "Drawing - lots" with text listing letters and corresponding initials: B by P, C by WD, D by L, E by S, J by S, N by S-H, P by D, S by SH, V by D. Includes GCHQ and Enigma Rating 1 logos. Hashtags at the bottom: #GCHQ #GCHQPuzzle.

ALT Puzzle image titled "Drawing - lots" with text listing letters and corresponding initials: B by P, C by WD, D by L, E by S, J by S, N by S-H, P by D, S by SH, V by D. Includes GCHQ and Enigma Rating 1 logos. Hashtags at the bottom: #GCHQ #GCHQPuzzle.

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This week’s puzzle answer is revealed. Were you on the right track?
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And that's a wrap on the National Intelligence History Conference 2026. Over the past three days, we've welcomed leading scholars, researchers and practitioners for thought-provoking talks, fresh perspectives and engaging debate. A huge thank you to all our speakers and attendees for making this year's conference such a success. See you in 2028! #NIHC @GCHQ
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英国政府通信本部 @GCHQ 長官、小林自民党政調会長 @Kobahawk と、日英の情報協力の今後について話し合いました。 情報機関の改革、AIが国家安全保障に及ぼす影響、共通の安全保障上の課題に対応するための両国の連携強化について、とても有意義な議論ができました。🇬🇧🇯🇵
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Day 2 of the National Intelligence History Conference 2026 delivered an inspiring programme of talks, research and discussion. Thank you to our speakers and attendees for being part of it. #NIHC @GCHQ
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A postcard from the North West 💌 Welcome to our Manchester office, right in the heart of the city on Albert Square. From Heron House, our brilliant people work alongside Manchester’s thriving tech sector and world-class academic community 🏙️💻🎓 ➡️ gchq.gov.uk/section/location…
Collage of two scenes in Manchester, UK. On the left, a modern building with a green tree in front under a clear blue sky. On the right, a city canal scene with high-rise buildings and a bridge. Logos include 'Manchester North West' and 'GCHQ'.

ALT Collage of two scenes in Manchester, UK. On the left, a modern building with a green tree in front under a clear blue sky. On the right, a city canal scene with high-rise buildings and a bridge. Logos include 'Manchester North West' and 'GCHQ'.

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A look back at Day 1 of the National Intelligence History Conference 2026. Thank you to everyone who joined us for an engaging day of discussion, insight and debate. #NIHC @GCHQ
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Day one of the National Intelligence History Conference is underway at Bletchley Park, with a plenary welcome from Professor Danielle George CBE, Chief Scientific Advisor for National Security at @GCHQ. Over the coming days, NIHC will bring together leading scholars, researchers and practitioners to explore the development, practice and wider historical significance of intelligence. #NIHC
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Are you looking for a fresh outlook on your 9-to-5? Whether you're starting your career, or looking to develop new skills, we're always looking for new talent to contribute to our missions 🔎 Discover your career next steps 👣 ➡️ gchq.gov.uk/working-at-gchq

Working at GCHQ

gchq.gov.uk
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Getting ready for the National Intelligence History Conference 2026. #NIHC @GCHQ
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🔥 Your weekly #GCHQPuzzle brain teaser is here! 🧩 Think you’re up for it? Solve this week’s puzzle and comment your answer below👇
The image features an enigma puzzle with the following question and options: "Jeopardy" with options: a) Judge Doom, b) One joined the army and one married Thelma, c) It's behind a double-parked van, d) She lives in a mansion with her sister Blanche. It has a GCHQ logo and is labeled "Enigma Rating 1" with the hashtag #GCHQPuzzle.

ALT The image features an enigma puzzle with the following question and options: "Jeopardy" with options: a) Judge Doom, b) One joined the army and one married Thelma, c) It's behind a double-parked van, d) She lives in a mansion with her sister Blanche. It has a GCHQ logo and is labeled "Enigma Rating 1" with the hashtag #GCHQPuzzle.

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Great puzzling all!
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We loved hosting Dame Maggie Aderin and #BBCTheSkyatNight crew to talk about why we value dyslexia so much. See her visit & chat with “Alan” (if that's his real name 😉 ) about his dyslexia and his love of space, on @BBCStargazing on @BBCiPlayer 🎬 ⭐️ 🔭
A person wearing a red shirt and vest is smiling while sitting among green plants. Brightly colored chairs are visible in the background. The setting suggests a casual or informal meeting area.

ALT A person wearing a red shirt and vest is smiling while sitting among green plants. Brightly colored chairs are visible in the background. The setting suggests a casual or informal meeting area.

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Shhhh... don't tell anyone, but the #BBCTheSkyatNight team have infiltrated @GCHQ! 🕵🏿‍♀️ Watch Maggie's interview with a real-life spy, now on @BBCiPlayer.
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GCHQ retweeted
NCSC UK
@NCSC
Oct 10
We were delighted to receive this letter from His Majesty King Charles III on the occasion of our tenth anniversary, recognising how the NCSC delivers on making the UK the safest place to live and work online. For practical cyber security advice visit ncsc.gov.uk
An image of a letter from His Royal Highness King Charles III thanking NCSC staff for their contributions to national security.

ALT An image of a letter from His Royal Highness King Charles III thanking NCSC staff for their contributions to national security.

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GCHQ retweeted
NCSC UK
@NCSC
Oct 9
For small businesses and sole traders, strong cyber security foundations are built one step at a time. You could complete a step from the Cyber Action Toolkit today in as little as ten minutes, try it now⬇️ cybertoolkit.service.ncsc.go… #CyberMonth2026

ALT Free cyber security toolkit. The Cyber Action Toolkit helps sole traders and small businesses take simple steps to secure against cyber criminals. Get your free toolkit

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GCHQ retweeted
NCSC UK
@NCSC
Oct 8
This month, the National Cyber Security Centre, part of GCHQ, turns 10. In a special message, CEO Richard Horne marks this milestone and explains why cyber security is critical for the UK’s resilience and growth. To learn more about our mission, visit ncsc.gov.uk
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GCHQ retweeted
NCSC UK
@NCSC
Oct 8
Today, the NCSC and international partners has exposed how China-linked company, Integrity Technology Group, has enabled malicious cyber activity worldwide. Organisations are urged to read the new advisory to understand the threat and techniques. ncsc.gov.uk/news/china-linke…

China-linked malicious actors called out by UK and international partners for targeting sensitive...

Joint advisory with international partners highlights malicious targeting of organisations from a range of sectors across the globe.

ncsc.gov.uk
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