Find an old post with a very good contest?

Question

Habr

On the eve (or immediately after) of some New Year (2010-2013) there was a very interesting contest, the topic of which I can not find the second day. Ask for help from the community.
The plot of the competition:
The user tells a complex and exciting almost detective story, at the end of which he was left with a piece of paper "with a cipher". And then there are many interesting stages of the competition with code decryption, binaries and an interesting denouement.
Very much I ask the link to a post or the author.

Answer 1

Whoo! Found it after an hour of searching! It? habrahabr.ru/post/161897/

Answer 2

And this is not one of the IT quests?
habrahabr.ru/post/144621/