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
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.