Former DHS Secretary Michael Chertoff says the most dangerous threat we face today is the frequent exposure of our personal data. As an author of the the USA Patriot Act, legislation which privacy advocates say is serious government overreach, some consider this an odd stance for Chertoff to take.But how do we protect ourselves?Want to support 1A? Give to your local public radio station and subscribe to our podcast. Have questions? Email the show at 1a@wamu.org and find us on Twitter @1a.