Dudek - Polish Cipher Machine

Everyone should have heard about involvment of Polish cryptographers in breaking Enigma. But there's another great story containing cryptography - DUDEK cipher machine.

Gynvael Polish Mission 006

Another challenge from Gynvael's polish stream. Let's see what we've got today.

Gynvael Mission 006

Challenge from Gynvael's stream. Let's take a look at it.

Welcome back agent 1336.
No mail.
> mission --take
MISSION 006               goo.gl/Z4u9cv             DIFFICULTY: ███████░░░ [7╱10]

GoogleCTF - Mindreader

GoogleCTF from this year was hard. I couldn't solve most of the challenges, the ones that I made took me a lot of time to finish. But that's why we're here, to learn from a good challenge and from mistakes made during attacks. That's why I'm looking forward to write ups for other challenges and I'm publishing ones for the challenges, that I have finished. Let's start from the one with biggest number of solves - mindreader.