Here is the write-up for the CTF challenge #21 organized by the team PPP. I liked this one pretty much, I think it was a very good challenge a bit tricky but still a very good one. Congrats to PPP for this original idea
We have obtained the binary for AED’s internal data encryption service, running at a9.amalgamated.biz:10240.
Obtain AED’s data encryption key.
We were the first team to solve this challenge, so we got some extra breakthrough points, and as far as I’m concerned we where the only ones who solved it.