NDH 2015 Weshgrow Writeup
Point = 300
Category = Crypto
By openning the url we redirected to following link:
As we know HMAC is a cryptographic message for authenticating using a secret key. So this has been made of something.
Also we could find another HMAC in the page source as you can see:
if you open the /flag address without the purposed HMAC you see redirection to
So this could be HMAC of pages and we should prepare a HMAC for