End of SHA-1 certificates
This post is over 5 years old, it may be out of date.
All SHA-1 certificates of C&CZ managed servers will be replaced by new SHA-2 certificates on short notice. This is necessary because SHA-1 is no longer considered secure enough for the future. The Chrome browser will display a warning as early as November 2014 at a website with a SHA-1 certificate, other browsers will follow later.