"Google will now begin encrypting searches that people do by default, if they are logged into Google.com already through a secure connection. The change also means that sites people visit after clicking on a result at Google will no longer receive "referrer" data that reveals what those people searched for, except in the case of ads." 
Source & More:
Source & More:
Code:
http://searchengineland.com/google-to-begin-encrypting-searches-outbound-clicks-by-default-97435
Code:
http://googleblog.blogspot.com/2011/10/making-search-more-secure.html