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 Forum index » Diversions » TimeWasters
GCHQ sets a recruitment codecrack puzzle
Moderators: Giskard, ndemeter, ScarpeGrosse
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tanuki
Kilroy

Joined: 01 Jun 2012
Posts: 1

 		GCHQ sets a recruitment codecrack puzzle
But you could also win a Nexus.
https://canyoufindit.co.uk/

Step 1 is:

Quote:
AWVLI QIQVT QOSQO ELGCV IIQWD LCUQE EOENN WWOAO
LTDNU QTGAW TSMDO QTLAO QSDCH PQQIQ DQQTQ OOTUD
BNIQH BHHTD UTEET FDUEA UMORE SQEQE MLTME TIREC
LICAI QATUN QRALT ENEIN RKG


I was playing with substitution but I'm not sure.

PostPosted: Wed Sep 11, 2013 12:26 pm
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davedubya
Boot


Joined: 05 Dec 2010
Posts: 68
Location: UK

 		Given that "e" is the most common letter (in English anyway), one could assume a substition of e=q.

However, I doubt it's as simple as a substitution cypher.

PostPosted: Wed Sep 11, 2013 7:14 pm
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Crescent
Decorated


Joined: 05 May 2006
Posts: 281

 		143letters - factors are two primes 11x13
grid?
_________________
matter of fact I could leave....

PostPosted: Wed Sep 11, 2013 7:38 pm
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Crescent
Decorated


Joined: 05 May 2006
Posts: 281

 		due to blocks of 5 - thinking enigma machine... Smile
_________________
matter of fact I could leave....

PostPosted: Wed Sep 11, 2013 7:43 pm
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Amelić
Decorated


Joined: 01 Jun 2012
Posts: 231
Location: Southampton, United kingdom
Crescent wrote:
due to blocks of 5 - thinking enigma machine... Smile


Ha, that thought had crossed my mind too...
It is late and I have so much reading for my course to do tonight, I shall poke at it again tomorrow!

we can do this, go team! *cheers*

PostPosted: Wed Sep 11, 2013 8:31 pm
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OZcracker
Guest


 		Solved
Solved
Solved, I could spoil and give the answer that that would be no fun. A clue instead, the numbers 11 and 13 are important, think transposition.....

PostPosted: Thu Sep 12, 2013 12:02 am
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Amelić
Decorated


Joined: 01 Jun 2012
Posts: 231
Location: Southampton, United kingdom

 		Yup! got it Smile The second I know what I am supposed to be doing, worked that out already.. but Amy and math = bad times Razz

edit: forget that, that was easier than i thought! solved answer number 2.

PostPosted: Thu Sep 12, 2013 8:46 am
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OZcracker
Guest


 		Stuck on 3
Stuck on 3
Second one wasn't too hard, the 3rd has me stuck though. I'm thinking mixed Caesar substitution but can't figure out the key. I'm sure I'll kick myself when I do. Any ideas?

PostPosted: Thu Sep 12, 2013 9:14 am
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AdamHarris
Guest


 		Re: Stuck on 3
Stuck on 3
OZcracker wrote:
Second one wasn't too hard, the 3rd has me stuck though. I'm thinking mixed Caesar substitution but can't figure out the key. I'm sure I'll kick myself when I do. Any ideas?


I'm still stuck on the first, this seems like a fun thing to do - not serious on the GCHQ job, though... any clues for 1?

PostPosted: Thu Sep 12, 2013 9:20 am
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OZcracker
Guest


 		Stuck on 3
Stuck on 3
My clue for 1 above should be enough, for 3 I'm now thinking the fact there are 256 characters and the only letters are a to f makes me think its a combo of mixed Caesar and a grid. This is hurting my brain, I should be asleep.

On a side note, great to find random people on the other side of the world that do this stuff for fun. Really don't want that job

PostPosted: Thu Sep 12, 2013 9:29 am
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AdamHarris
Guest


 		I also looked into the page source, the congratulations page mentions nothing about a job, just prizes.

Also, remember we're FINDING stuff, look at the webpage itself - in the background behind the letters there's the date 'Sat February 12 - 22:22:41' - Saturday Feb 12th was in 2011... anything significant?



PostPosted: Thu Sep 12, 2013 9:44 am
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ravensburg
Guest


 		2nd
Stuck on 2....am I wrong think base64?

PostPosted: Thu Sep 12, 2013 9:53 am
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ymgve
Boot

Joined: 24 Dec 2006
Posts: 11

 		Re: 2nd
ravensburg wrote:
Stuck on 2....am I wrong think base64?


Base64 is, well, "right", but the top and bottom lines are much more important.

Also, hint for number 3 - 128*8=1024 bits.

edit: For those that solved it - were there any fifth task for you? After solving the fourth one I got the next URL splashed right into my face, and there was really nothing to solve.

PostPosted: Thu Sep 12, 2013 10:25 am
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Amelić
Decorated


Joined: 01 Jun 2012
Posts: 231
Location: Southampton, United kingdom

 		Re: 2nd
ymgve wrote:
ravensburg wrote:
Stuck on 2....am I wrong think base64?


Base64 is, well, "right", but the top and bottom lines are much more important.

Also, hint for number 3 - 128*8=1024 bits.

edit: For those that solved it - were there any fifth task for you? After solving the fourth one I got the next URL splashed right into my face, and there was really nothing to solve.


Nope, but the word for the last answer is right in front of your face.

I have to say, I am feeling rather proud of myself for solving that! I managed it with only one coffee aswell! Razz

PostPosted: Thu Sep 12, 2013 10:30 am
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AdamHarris
Guest


 		Re: 2nd
Amelić wrote:
ymgve wrote:
ravensburg wrote:
Stuck on 2....am I wrong think base64?


Base64 is, well, "right", but the top and bottom lines are much more important.

Also, hint for number 3 - 128*8=1024 bits.

edit: For those that solved it - were there any fifth task for you? After solving the fourth one I got the next URL splashed right into my face, and there was really nothing to solve.


Nope, but the word for the last answer is right in front of your face.

I have to say, I am feeling rather proud of myself for solving that! I managed it with only one coffee aswell! Razz


What's everyone talking about with URLs? I solved all of the words and entered them but just got taken to a congrats page. And, the first one is transposition ciphers for those of you who are still stuck on the first.

PostPosted: Thu Sep 12, 2013 11:38 am
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