Typically, if behavioral biometrics are used for authentication they mitigate replay attacks by asking users to answer a challenge chosen at random. So, if aut

Typically, if behavioral biometrics are used for authentication they mitigate replay attacks by asking users to answer a challenge chosen at random. So, if authenticated via keystroke dynamics a users would be asked to type a given challenge string. In a similar vein, with speaker verification scheme the user would be asked to speak out the challenge. When the same biometrics are used for identification purposes they should not assume the collaboration of the user. I don't have idea about what Scout Analytics' solution does.