GCHQ (@GCHQ) header
GCHQ (@GCHQ) profile picture

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
  • Tweets9.8K
  • Following326
  • Followers186K
6.9KMedia
Photo by GCHQ (@GCHQ)Photo by GCHQ (@GCHQ)Photo by GCHQ (@GCHQ)Photo by GCHQ (@GCHQ)Photo by GCHQ (@GCHQ)Photo by GCHQ (@GCHQ)Photo by GCHQ (@GCHQ)Photo by GCHQ (@GCHQ)Photo by GCHQ (@GCHQ)Photo by GCHQ (@GCHQ)
Our brilliant people work 24/7 on our mission to protect the UK from those seeking to do us harm, including: ⦿ Cyber criminals, ⦿ Hostile states, ⦿ Terrorists. Find out more about our vital work ⬇️ gchq.gov.uk/section/mission/…
Exterior view of the GCHQ building at dusk, featuring its modern architecture and a colorful sky in the background.

ALT Exterior view of the GCHQ building at dusk, featuring its modern architecture and a colorful sky in the background.

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🧩 Time to put your thinking cap on - this week’s #GCHQPuzzle awaits. Have you cracked the code?🔐 Drop your answer below!
A puzzle image with a gradient pink background titled "What's out?" The text includes word transformations: RIGHTS to ZONAL, APPEAR to PETER, YOUTH to MINA, TWIST to PEAL, DEEP to HIT, JUGS to DAY. The question asks what does OUT become. The image is branded with "GCHQ," and features the hashtags #GCHQPuzzle and "Enigma Rating 1" in the top right corner.

ALT A puzzle image with a gradient pink background titled "What's out?" The text includes word transformations: RIGHTS to ZONAL, APPEAR to PETER, YOUTH to MINA, TWIST to PEAL, DEEP to HIT, JUGS to DAY. The question asks what does OUT become. The image is branded with "GCHQ," and features the hashtags #GCHQPuzzle and "Enigma Rating 1" in the top right corner.

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Great puzzling this week all! 🔎
Image from GCHQ (@GCHQ)
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GCHQ retweeted
NCSC UK (@NCSC) profile picture
NCSC UK
@NCSCOct 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…
Image from NCSC UK (@NCSC)
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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?
Image from GCHQ (@GCHQ)
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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。🇬🇧🇯🇵
Image from Corin Robertson (@CorinRobertson)
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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
Image from Bletchley Park (@bletchleypark)
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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

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!
Image from GCHQ (@GCHQ)
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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) profile picture
NCSC UK
@NCSCOct 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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