Having overcome the high costs and poor accuracy that once stunted its growth, one form of biometric technology -- facial recognition -- is quickly moving out of the realm of science fiction and into the commercial marketplace. Today, companies are deploying facial recognition technologies in a wide array of contexts, reflecting a spectrum of increasing technological sophistication. This book discusses recent and possible future advances in the use of facial recognition technologies; ways consumers can benefit from these uses; and the privacy and security concerns raised while promoting innovation.