It’s no secret that social media has fundamentally changed the way we communicate with one another. With sites like Facebook, Twitter, LinkedIn and Foursquare, companies can now find out where you work, what you look like and even what your favorite coffee shop is.

But how much information is too much information, and can anything really remain private in this age of virtual overload?

Recently, technology company Viewdle announced that it would be releasing its cross-platform facial recognition software on mobile devices. Having Viewdle on your phone would allow you to create face prints for all of your friends and family and instantly recognize them in all of your photos and video.

This would be super-handy when trying to tag people in Facebook albums, but what if this sort of technology got into the wrong hands? For example, what if it aided a kidnapper in abducting a child?

Many similar questions are arising as the law continues to keep pace with these new technologies. To learn more, we talked with Andrew Serwin, partner at Foley & Lardner LLP and author of Information Security and Privacy: A Guide to Federal and State Law and Compliance as well as the Internet Marketing Law Handbook.