NEC has launched a biometric security program that uses face recognition to unlock access to PCs. NeoFace Monitor is being billed as an alternative to passwords, which can be forgotten, stolen or guessed. Users simply look at a webcam on their PC to unlock it.The system uses face-recognition technology that NEC has been developing for some 20 years. It's a software package that uses a computer's webcam to verify the identity of a user by matching facial features to those in a stored image.