The next change for SSL Certificates
Certificate Transparency (CT) is a Google initiative to log, audit, and monitor certificates that Certificate Authorities (CAs) have issued. A CT’s intent is to prevent CAs from issuing public key certificates for a domain without the domain owner’s knowledge.
Google recently announced that certain SSL Certificates with a lifecycle beyond the 1st of January 2016 are going to be treated as progressively less trustworthy by future versions of Chrome. The SSL Certificates in question are those signed using the slightly dated SHA-1 hashing algorithm. The same is going to apply to SSL Certificates which have been signed using SHA-256, but contain SHA-1 Intermediates within their chain of certificates (Chromium Blog Post, 5th of September 2014).