This invention discloses a system wherein behaviormetrics are utilized to authenticate electronic transactions, either alone or in combination with other identifiers such as PIN's, passwords, codes and the like. Probability profiles or probability distribution representations may be constructed for determining whether a purported or alleged authorized user is in fact the authorized user, by comparing new data on a real-time basis against probability distribution representations including an authorized user probability distribution representation and a global or wide population probability distribution representation, to provide a probability as to whether the purported authorized user is the authorized user. This invention may utilize keypad, touch screen dynamics, X-Y dynamics, data, X-Y device data, or other data from similar measurable characteristics (such as movement filmed by an ATM machine), to determine the probability that the new data from the purported authorized user indicates or identifies that user as the authorized user.