easy 🐈

You managed to get access to the KittyCorp encryption system code! But it seems like it requires some sort of keycode in order to decode the catnip storage password.

Thankfully, you managed to find a test file with both an input and an output! How handy! Maybe you can use this to find the key?

kittycrypt.tar.gz

Hint!

example_output and flag_output use the same keys!

By: User

medium

Behold my original knut sacque scheme in 4D

knutsacque.tar.gz

Hint!

Flag format is not required for intended solution; but it matches irisctf{[a-z_-!]+}

By: sera

easy or not?

Something is a bit off with my AES implementation. Get it?

AES implementation is directly from here .

nc ayes.chal.irisc.tf 10100

ayes.tar.gz

By: sera

hard

My Super Stable SPHINCS+ Signature Service is Now Available!

nc sphincs5.chal.irisc.tf 10103

sphincs5.tar.gz

By: sera