Hello, I found some issues with the HTTPS version of your page:
- there is mixed HTTP/HTTPS content on the page. When opening with
https://www.gnupg.org, the are images which are transfered with HTTP (from w3c.org).
- The intermediate CA, CAcert Class 3 Root, uses MD5withRSA which is weak See the analysis https://www.ssllabs.com/ssltest/analyze.html?d=www.gnupg.org
- Weak ciphers are ofered by your server, RC2, RC4, DES https://www.ssllabs.com/projects/best-practices/index.html
- Please consider enabling STARTTLS for SMTP traffic on your mail server
ns1.u64.de.