Google is working on making their Gmail system or any email system more secure by working on a chrome extension for their Chrome Browser. It is in Alpha stage at the moment
'Today, we’re adding to that list the alpha version of a new tool. It’s called End-to-End and it’s a Chrome extension intended for users who need additional security beyond what we already provide.
“End-to-end” encryption means data leaving your browser will be encrypted until the message’s intended recipient decrypts it, and that similarly encrypted messages sent to you will remain that way until you decrypt them in your browser.'
This will be good news and for one we look forward to it see their full blog post http://googleonlinesecurity.blogspot.co.uk/2014/06/making-end-to-end-encryption-easier-to.html