About to have a look at the document posted here <https://freedom-to-tinker.com/2017/10/25/howto-protect-your-small-organization-against-electronic-adversaries/>. Unfortunately, for a document that’s about security, wget tells me the link is (currently) not secure: WARNING: The certificate of ‘www.cs.rice.edu’ is not trusted. WARNING: The certificate of ‘www.cs.rice.edu’ hasn't got a known issuer. WARNING: The certificate of ‘www.cs.rice.edu’ was signed using an insecure algorithm.