V.V Das et al. (Eds.): BAIP 2010, CCIS 70, pp. 136–143, 2010. © Springer-Verlag Berlin Heidelberg 2010 Multimodal Biometric Invariant Moment Fusion Authentication System P. Viswanathan, P. Venkata Krishna, and S. Hariharan VIT University, Vellore 632014 {pviswanathan,pvenkatakrishna,s.hariharan}@vit.ac.in Abstract. The authentication based on biometric is more reliable and secure because of using the unique physical feature of human. Initially, mono biometric system was used for authentication but it has some error rate and hence multimodal biometric system was introduced to reduce the error. The constraint of using these systems is to maintain more information. Without reducing the error rate and maintain the above constraint a new algorithm has been developed which is based on the invariant moment information of fingerprint and face which is fused using variation. In this algorithm the fingerprint and face is segmented and the invariant moment information is extracted. The invariants are fused into a single identification value by using coefficient variance. This single value is authenticated by calculating the difference, evaluated using the threshold value which is set as 90% for fingerprint and 70% for face, provides low error rate of FAR and FRR. The algorithm is tested under cooperative and non cooperative condition and obtained less complexity, storage, execution time, high reliability and secure authentication system. Keywords: Fusion, FAR, FRR, variation, invariant, coefficient, STFT, face, fingerprint. 1 Introduction The recent advancement in technology resulted more threats to personal data and national security due to large amount of electronic data processing. The information transmitted through online can be easily hacked and overridden the authorised user by the hackers. There are many traditional methods such as password, watermarking, cryptography based systems to protect the data’s from the hackers. But they were not up to the safe mark because they could be easily cracked by the brute force method [3]. The biometric based authentication was introduced to avoid the brute force attack. It means the authentication was performed by the unique physical features of human like fingerprint [4] or Iris. It gives high secured systems than the traditional methods. Initially, the mono biometric[1] authentication system was used. In this, the authentication was performed by single biometric system [5] and resulted in large no of error rates when there were many features which were similar. In order to overcome the large error rates, the multimodal biometric system has been developed. It means more than one biometric [6] is used simultaneously to