Study enough psychology to be able to guess other people's passwords
You don't need to study psychology for that. The lists of common passwords are freely available along with tools to apply them.
then hack into the NSA
You don't imagine they rely on text passwords, do you..?
I'm reasonably sure there's somewhere along the chain that I'd be able to figure out how to get in at 100% control of my own brain. Maybe not specifically passwords, but if I hacked some top employees emails, I should be able to build on that. Or add myself to the top-secret clearance list and do it that way.
If the NSA used common passwords, they'd already be hacked many times over. I'm talking about getting their secure passwords, which should be a lot easier than doing it now. Social engineering when you can think many times faster than the person you're...
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