I'm guessing it's a false positive from using an IP similar to a sketchy site. It looks like the IP points to Linode. For what it's worth, I enjoyed the puzzle

I'm guessing it's a false positive from using an IP similar to a sketchy site. It looks like the IP points to Linode. For what it's worth, I enjoyed the puzzle when I completed it three years ago. A practical exercise cracking the RSA keys followed by a small classic code breaking puzzle.