“…In the field of mobile behavioral biometrics, a challenge for the research community is given by the scarcity of public databases, and by the fact that the recent, most promising studies in the field are often very heterogeneous [1,2,3,4,9,14,23]. Consequently, it would be difficult to reach a global and significant conclusion from the comparison of such systems, given the different approaches, scopes and the usage of self-collected nonpublic databases.…”