A Senate hearing last month revealed the about the use of facial-recognition technology, both by government law enforcement agencies and private companies like .

Europe is Facebook's initiative, .

A professor from Spain's Universidad Autonoma de Madrid told the Black Hat conference recently that researchers there have come up with a way to that fools the systems into identifying one person as another, raising fears that the main benefit of biometrics -- certainty -- may not be as reliable as promised.

There are many privacy organizations and advocates with serious reservations about the use of biometric identification technology of any kind.

Moreover, many people associate fingerprinting with criminality, and they just