Gmail Warning Targets-Of-State-Backed-Hacks

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Google’s Limitations

The warnings are also an acknowledgement that while Google already alerts users to suspected fraudulent activity on many websites and in certain e-mails, there are limitations on its ability to block cyber-assaults.

Sophisticated attacks often take the form of personalized e-mails that aren’t caught by spam filters. The hackers often try to plant malicious software, or malware, on users’ machines to steal account passwords and other data.

http://www.bloomberg.com/news/2012-06-05/google-warns-users-who-may-be-targets-of-state-backed-hacks-1-.html