Combining cryptography with biometrics for enhanced security

In the last decade of computer security, using biometrics for various types of security problems has become more and more popular. The uniqueness of biometrics for any specific human being makes the identification system more secure. Biometrics is widely used in person identification and verification. Biometrics as such poses few security risks. Combining cryptography with biometrics is a new research area. This technique proves to be more secure. In this paper we give discuss about biometric encryption or biometric cryptography approaches and algorithms which use various biometric data. We basically deal with the use of keystroke dynamics, speech and 2D biometric data (such as fingerprint, palmprint, face, etc).