My intentions is that I want a complete list of .no (Norwegian) domains, and http://norid.no refuse to give out that list to anyone.
I would like to be able to continuously check the Norwegian IP-space for compromised sites, because it would be interesting to see. Of course doing this on a bigger scale would be cool as well.
I myself was trying to download all X509 server certificates on the Internet I could find to:
- gain some insight into the dealings of CAs
- see if private keys were reused across multiple sites
- check the average expiry date of certificates etc.