Encapsulating

Christmas Cyber Security Challenge 2013 – Polar Bear

I was convinced this was a cipher generated by an Enigma machine, and subsequently spent a rather long time trying to figure out how to crack the code using an Enigma machine emulator. Then I remebered that GCHQ did something similiar recently – they had some ciphertext challenge which looked suspiciously similiar in format (5 upper case character blocks). I looked up the answer for the GCHQ challenge, and turns out this challenge is no different. Hey, I didn’t cheat, I played smart :)

DZKPNUUXS
EHEIEZFZZ
AOZCXNCFK
RPTTTEZRO
ZEHUZEDOW
SZERCDOMS
AYZEOZTZK
NOCZDIZMI
TUUTESJRZ
AZTHZZRZZ
ZLEEYQSMZ
IIZZOFBYZ
https://cybersecuritychallenge.org.uk/QFUFC.JRSBX

Read the text from top to bottom (columns), not rows. Z is a space. Next..

EDIT: Oh yeah, how the fuck did I get that string in the first place? Erh, Alpha plane 2. Look up the stegsolve utility, very useful.. I must be tired or something.

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