Lorrie Faith Cranor studies online privacy, usable security, phishing, spam and other research around keeping people safe online. In this TED Talk she reports on a study of passwords that people routinely use. Cranor studied thousands of real passwords to figure out the surprising, very common mistakes that users - and secured sites - make to compromise security. And how, you may ask, did she study thousands of real passwords without compromising the security of any users? That's a story...