Abstract: A system and methods for interpreting a user's movement through space as a passive behavioural biometric is described. Using patterns of user's movement through space, the system detects anomalies in user movement, provides or restricts access to a restricted space without adding extra friction to the user, and generates risk events. An adjacency matrix (i.e., footprint) is generated by analyzing a user's movement through space and creating a weighted directed graph for the user. Anomalies are detected by comparing a user's footprint against the same user's earlier footprint, or the footprints of other users within a group, or the footprints of all other uses in the system.