In this paper, the authors discuss the contact less palm vein authentication device that uses blood vessel patterns as a personal identifying factor. The vein information is hard to duplicate since veins are internal to the human Body. This paper presents a review on the palm vein authentication process and its relevance and competence as compared to the contemporary Biometric methods. This authentication technology offers a high level of Accuracy. The importance of biometrics in the current field of Security has been illustrated in this paper.