Biometric authentication system has become one of the tremendous developing technologies for security based applications. But today unimodal biometrics has to face some of the unavoidable drawbacks like unacceptable error rates, noisy biometric data, and spoof attacks. Multimodal biometric systems are those which utilize, or capability of utilizing, more than one physiological or behavioral characteristic for enrollment, verification or identification. Multimodal biometric authentication system provides some of the major advantages like accuracy, anti-spoofing etc. Multimodal biometric systems consolidate the evidence presented by multiple biometric sources and typically provide better recognition performance compared to systems based on a single biometric modality.