Abstract: A computer implemented method of authenticating a user based on comparison of biometric data authentication process parameters measured during a biometric authentication process against a biometric signature authentication process model of the user, comprising receiving sensory data captured by one or more sensors operated to capture biometric data of a user during a biometric authentication process conducted to verify a biometric signature of the user, calculating a deviation of values of a plurality of authentication process parameters measured during analysis of the sensory data from the values of corresponding reference authentication process parameters retrieved from a biometric signature authentication process model of the user and authenticating the user based on verification of the biometric signature and according to the deviation.