Transparency

We are given a public RSA key that is used in the X509 certificate for the HTTPS connection to a Cryptohack domain. I solve it in the easy way, and uses a subdomain lookup site. A good one to use is crt.sh, and the query is https://crt.sh/?q=cryptohack.org, or https://subdomains.whoisxmlapi.com/. We can go over the list of subdomains to find the correct subdomain for the solution. We can instead solve this without using this comprehensive list of subdomains....