I generally use 'threat intelligence' when I'm talking about a product packaged and sold by a dedicated commercial entity and 'information sharing' as something that happens between security teams at trusted parties without renumeration.

A lot of the people who are hacking on behalf of governments are doing so on a contract basis. And they also do other things. They will hack on behalf of spammers, and will just be hired for a specific job.

I have spent my career building and improving secure, trustworthy systems, and I am very proud to be working on security at Yahoo.

I think... all of the best public cryptographers in the world would agree that you can't really build back doors in crypto. That it's like drilling a hole in the windshield.