I have been involved in technology security for a very long time. As far back as the mid-nineties, my contemporaries have been privately speculating that nation-states1 have been involved on the black hat side of things.
Quite a lot of things just don't make sense. The numbers and sophistication of viruses and worms, the timing of zero-day attacks and the publication of China's asymmetric warfare plan called the Dragon's Spear2.
Recently- there have been a number of revelations about the US National Security Agency. Specifically their involvement in the Stuxnet worm3 and allegations that they knew about the Heartbleed flaw as far back as two years ago4.
Sadly- NSA and others within our goverenment have proven to be above the law and have cost the people billions in fraud, identity thief and various cyber-crimes.
I hope that I haven't drifted to close to the politics thing- I didn't point fingers at guilty parties.
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1- Nation-States have economic, personnel and technical resources that just aren't available to individuals, groups or private companies.
2- Information Warfare: China has a Scary Plan http://www.strategypage.com/htmw/htiw/articles/20120301.aspx
3- Stuxnet http://en.wikipedia.org/wiki/Stuxnet
4- NSA Knew About Heartbleed for 2 Years https://www.yahoo.com/tech/report-nsa-knew-about-heartbleed-vulnerability-for-82407088205.html