Splyt [96 points, 105 solves]
Bob splitted a secret and gave some pieces of it to some of his friends. We managed to convince Eve and Chris to give us their shares.
Rock Solid Cryptography [33 points, 184 solves]
7º 2' 34.46" W 54º 41' 54.28" N
Pay attention: the flag is not in the standard format
Update: Flag format: all uppercase
Back to the Exploit [0 solves]
We got these misterious files from a weirdo claiming to be a scientist...
nc btte.chall.polictf.it 31336
nc btte.chall.polictf.it 31337
Update: Just to be clear, port 31336 and 31337 are different services, you need to use both to solve the challenge.
Hint: Have You already figured out the date the starting message was received?
(server-side sources not released, sorry)
Super-secure custom One Time Pad! [500 points, 1 solve]
Somebody managed to grab some packets from our network, but we're using a custom super-shiny cryptosystem which is unbreakable!
Lucky Consecutive Guessing [301 points, 32 solves]
We implemented a random number generator. We've heard that
rand()'s 32 bit seeds can be easily cracked, so we stayed on the safe side.
nc lucky.chall.polictf.it 31337