I strongly believe in the good security for everything connected to IT, and my favourite way of protecting my WordPress sites is to use the WordFence plugin (free and paid versions available). The guys that created the plugin also send out regular newsletters informing us of important security developments.
Today they have stated that the Google’s Chrome browser is in the process of ending support for Symantec SSL/TLS certificates. This applies to companies owned by Symantec too. If you are running one of these certificates on your website, visitors using Chrome will start receiving a nasty error if you don’t take action very soon.
To find out more about this situation and what you can do if it affects you, I’d strongly recommend you read the WordFence report blog entry here.