Biometric computing offers an effective approach to identify a person by using an individual's unique reliable and stable physical and/or behavioral characteristics, and is regarded as an effective method for recognizing a person's identity with a high confidence. Palmprint is one of these biometric features which are used in such a security system because they are stable and contain lots of features such as principal lines, wrinkles, ridges, datum points, etc. and they are user-friendly. In this book, the system starts with palm acquisition, Preprocessing, feature, and matching were conducted and evaluated.