NLFSR
Challenge Information category: crypto points: 235 Description Easy lfsr easy crypto ้พๆฅ๏ผhttps://share.weiyun.com/5qZbNLR ๅฏ็ ๏ผn9huwc https://drive.google.com/open?id=1a5GMVZ77CM1rOrayKJcV3UvMwAy-uGsg Writeup Author 0ssigeno meowmeowxw Solution To understand how a general nlsr works, please read this article from ctfwiki. What did we learn from that article? That we must find a strong correlation between the output and one of the input. So we made a little script to retrieve the truth table of (ao * bo) ^ (bo * co) ^ (bo * do) ^ co ^ do The table retrieved is the following: ...