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Calling all code breakers 
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GCHQ are hiring.

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Thu Dec 01, 2011 9:27 am
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Aha!

Breaks out the program I wrote to do exactly this...

(Stupid that it's an image and not copyable text though)

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Oliver Foggin - iPhone Dev

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Thu Dec 01, 2011 9:29 am
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What Cypher do you think they're using Oli?

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Thu Dec 01, 2011 9:32 am
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eb 04 af c2 bf a3 81 ec 00 01 00 00 31 c9 88 0c
0c fe c1 75 f9 31 c0 ba ef be ad de 02 04 0c 00
d0 c1 ca 08 8a 1c 0c 8a 3c 04 88 1c 04 88 3c 0c
fe c1 75 e8 e9 5c 00 00 00 89 e3 81 c3 04 00 00
00 5c 58 3d 41 41 41 41 75 43 48 3d 42 42 42 42
75 3b 5a 89 d1 89 e6 89 df 29 cf f3 a4 89 de 89
d1 89 df 29 cf 31 c0 31 db 31 d2 fe c0 02 1c 06
8a 14 06 8a 34 1e 88 34 06 88 14 1e 00 f2 30 f6
8a 1c 16 8a 17 30 da 88 17 47 49 75 de 31 db 89
d8 fe c0 cd 80 90 90 e8 9d ff ff ff 41 41 41 41


It's been out for a few days, many people have already transcribed it.

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Thu Dec 01, 2011 9:32 am
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jonlumb wrote:
What Cypher do you think they're using Oli?

No idea, just wrote a code breaking thing a while back and thought I'd run this through it :D

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Oliver Foggin - iPhone Dev

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Thu Dec 01, 2011 10:03 am
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Was thinking about this last night.

Too much on atm to try it, maybe this weekend will have a go.

I think it'll be a straight forward XOR cypher and the anser will be the password used to encrypt the plaintext.

The problem is not knowing how long the password is etc...

Will have a go and see what happens.

I've done XOR decryption before but I was given the length of the password to make it easier.

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Oliver Foggin - iPhone Dev

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Fri Dec 02, 2011 4:09 pm
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OK, so I've rewritten and improved my decryption program.

I can now XOR the whole text quite easily.

Just need to write an algorithm to run through different password possibilities and do some frequency checking etc...

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Oliver Foggin - iPhone Dev

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Fri Dec 02, 2011 5:09 pm
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For those who are interested the passphrase is here:

http://forum.xda-developers.com/showthr ... p=19888836

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Fri Dec 02, 2011 5:21 pm
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Doesn't that kind of defeat the object?


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Oliver Foggin - iPhone Dev

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Fri Dec 02, 2011 7:34 pm
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Spreadie wrote:
Have you got what it takes?


no :lol:


Fri Dec 02, 2011 7:39 pm
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Calling all code breakers … JFGI.

Mark

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Sat Dec 03, 2011 12:27 am
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