From Newsgroup: rec.puzzles

The National Cipher Challenge 2025 is approaching. Register from 18th September.

https://www.cipherchallenge.org/

From the previous year's site:

"The National Cipher Challenge has been run by the University of
Southampton Mathematics Department since 2002 and has attracted a wide following. We count ex-Cabinet Ministers (an maybe some current ones rCo
would love to hear from them!), media scientists, journalists, authors
and actors among our fans. We even had the pleasure of introducing the
Cipher Challenge team from Saint AnnerCOs School in Southampton to the
Duke of Edinburgh who, remembering his work in the second world war immediately fell in love with the competition and gave Harry a reading
list for the summer".

"Who is the competition for?"

"The competition is for everyone, the prizes are more restricted! We no
longer collect personal information about competitors unless you are in
line for a prize, so anyone can take part. The prizes are restricted to
UK residents in full time school or 6th form level education, and if you
are a contender for one of these we will be in touch at the end of the competition using our Messaging system to verify eligibility. We canrCOt
email you because we donrCOt ask for your email unless you register as a teacher, and you will see a flag on the top right of every site page if
you have a message waiting for you".
--
David Entwistle

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From Newsgroup: rec.puzzles

On 03/09/2025 13:43, David Entwistle wrote:

The National Cipher Challenge 2025 is approaching. Register from 18th September.

If you are thinking of taking part, the challenges start easy and get
steadily more difficult. Generally the challenges are classical ciphers, rather than what may be considered encryption. To be well prepared, you
can access some information and practice ciphertext, at the links below:

https://nrich.maths.org/search?text=cipher

Previous year's National Cipher Challenges are available at a link of
the following form:

https://YYYY.cipherchallenge.org/ where YYYY is replaced with the year
of the challenge.

Lots of training material in the previous year's resource section:

https://2024.cipherchallenge.org/resources-media/

If you are github inclined, then there is lots of material here
(maintained by 'Madness'). This includes participant's own challenges
posted to the forum:

https://github.com/themaddoctor/BritishNationalCipherChallenge

Good luck. I may see you there.
--
David Entwistle
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