united kingdom

Past Ciphers

Cipher one:

Our first cipher is aimed at under 18s - anyone can play, but pick your fight with the right size challenge for your skill set. This one is a bit of fun for those with a little experience in simple encoding techniques. Solving the cipher will reveal a win code which you need to email, along with your name to media@cybersecuritychallenge.org.uk Every correct answer will receive a congratulations email from the Challenge team but the winner will be the first person to email us the correct code. It 's much more fun for everyone if each participant has the same opportunity to complete the cipher challenge. So we politely ask that anyone who solves the cipher keeps the answer and the method they used to themselves until the Challenge team has announced the winner. So if you find the answer - send it to us and then sit back and wait to be showered in glory!

Cipher two:

Now here is something a bit trickier. We have aimed this at university students but you can still have a go if you are younger. It tests both technical and investigative skills. Only the correct approach will provide you with instructions for how to submit your answer. Our request to not publish your answer still applies - please keep it to yourself until we announce a winner. Then you can boast about your success to your heart 's content. ZipFileContents

Cipher three:

Who 's up for something really special? This cipher is the last in the current set. It 's designed for those with professional experience in the cyber security industry. It 's a tough challenge and definitely one for the experts, so have fun but don 't let it keep you awake all night! Remember, if you complete the cipher, please keep the answer and approach to yourself, so everyone can experience the same fun (or torture) trying to solve it! This is your ciphertext to be decrypted once you 've found all the key parts.

Cipher Text: 3425190F2C2B2C1E28333A17033B25050E22362B10563D
34335738511D1B0035191A0D0E05002F18 55182E164755

Part One:

Part Two: Great Expectation Chapter One PartTwo

Part Three: Binary bbid|gl{~a

Part Four: As I was going to St Ives I met a man with seven wives Each wife had seven sacks Each sack had seven cats Each cat had seven kits Kits, cats, sacks, wives How many were going to St Ives? Hey middle diddle, The cat and the fiddle, The cow jumped over the moon, The little dig laughed to see such sport, And the fork ran away with the spoon Three blind mice. Three blind mike. See how they run. See how they run. They all ran after the farmer 's wife, Who cut off their nails with a carving knife, Did you ever see such a sight in your life, As three blind mice? Oh, The grand old Duke of York, He had ten thousand men; He marched them up to the tip of the hill, And he marched them down again. And when they were up, they were up, And when they were down, they were down, And when they were only half-way up, They were neither up not down.

Part Five: 9A918B968B86

Part Six: 6C79706A6781

Part Seven: 412153219293

Part Eight: PartEight

Part Nine:

Parts Ten and Eleven:

The last two parts are in James Lyne 's presentation from Skills London 10. James Lyne - Skills London 10


Christmas Cipher - 2010

As we approach the Christmas break, we would like to leave you with a festive offering in the form of our latest cipher challenge.

Whilst the team here are tucking into our turkey and roast veg, we hope all of you will be busy pondering our devious yuletide puzzle.

We will take a look through the responses when we return in the New Year to identify out latest winner and the next name to go up on our Roll of Honour.

And finally from everyone at the Challenge, enjoy the holidays and we will be back in touch in the New Year!

Click the link below to start the cipher!



Cyber Security Challenge Conundrum

The Cyber Security Challenge UK has unveiled a new cipher linked to the London Conference on Cyberspace being organised this week by the Foreign and Commonwealth Office. The new cipher, designed for the Challenge by Senad Zukic, a previous cipher winner, and now employed by PWC in its Threat and Vulnerabilities Management team, is the seventh offered by the Challenge since its inception in July 2010, and offers a new test for those who love to solve its digital conundrums.

The cipher is available online for anyone to try their luck. It can be found on the London Conference on Cyber Security website - Click here