Legendre Polynomials based biometric authentication using QRS complex of ECG

In this paper we propose a new Legendre Polynomials based ECG biometric technique that can efficiently be used for person indentification and authentication. we apply high-order Legendre Polynomials on QRS Complex of ECG which is considered one of the most unique signature bearing parts. We show that coefficients generated from various degrees of polynomial matchings are unique for the same person but We show that coefficients generated from various degrees of polynomial matchings are unique for the same person but are significantly different from others. We also show that even with a 4th degree ploynomial fit person authenitication/identification is possible with high degree of accuracy. This is an interesting result as we can achieve significant reduction of key sizes when coefficients generated by these fits are used as unique keys for authentication and verification of subjects.