Eric Grosse, VP Security Engineering: We are constantly on the lookout for malicious activity on our systems, in particular attempts by third parties to log into users’ accounts unauthorized. When we have specific intelligence—either directly from users or from our own monitoring efforts—we show clear warning signs and put in place extra roadblocks to thwart these bad actors.
http://googleonlinesecurity.blogspot.co.il/2012/06/security-warnings-for-suspected-state.html
ClearSky Cyberdefense Forum 