SHA is a popular hashing algorithm used by the majority of SSL certificates. As computing power has increased the feasibility of breaking the SHA1 hash has increased.
A warning is displayed in the Chrome console window regarding your certificate
From 9th December 2010 RapidSSL and Geotrust certificates have been issued from a new 2048Bit root. The GeoTrust Global CA root is not installed on various mobile devices. The GeoTrust Global CA may be included in a future update of these devices.
If you have lost your certificate, need to move servers or had a problem with the installation then it may be possible to re-issue your certificate at no extra charge providing the common name remains exactly the same.
Information on how to validate your SSL certificate order using DNS authentication.
Email Authentication is available as an option to verify ownership of your domain.
How to complete DNS authentication for RapidSSL, Geotrust or Thawte orders
The following SSL certificates are present in Windows Mobile 5/6 devices and the majority of smartphone devices.
Domain validated SSL certificates can be issued very quickly. But before the certificate can be issued you must be able to validate ownership. There are three options available to do this automatically.
Receive up to 12 additional months on your certificate when switching from a competitor.