The first generation of biometric technology to identify the shape and surface characteristics of a certain part of the body, such as fingerprints, hand geometry, face, iris and so on. 
The second generation of biometric technology to identify the shape and characteristics of the body's internal human eye can not see, such as vein recognition. 
The third-generation biometric technology is DNA, different from the first and second generation biometric technology is characterized by any part of the DNA of a person is the same.

本信息由：鑫光智信软件技术 发布