Harvard Business Review takes a critical look at biometrics, comparing contemporary methods of identification with England’s first “passport” – and considering what challenges could lie ahead from a data security point of view. The longer behavioral biometrics can track behavior and find patterns, the more dependable biometrics become – used for everything from gauging the dynamics of a typist’s unique mouse usage to tracking “gaze based” mannerisms. Before 1414, local reputation trumped official documentation as the primary identifier for access control purposes. What does it mean in terms of lobby management and passport usability? The author, taking stock of privacy concerns early on, offers a reminder that new technologies can be leveraged in unintended ways.