Fig. 18From: Where you go is who you are: a study on machine learning based semantic privacy attacksExperimental results with lower granularity of activity distinction (6 categories). As expected, the place labelling accuracy is higher than with 12 categories, converging to 40% (a). However, a lower granularity of the categories results in less expressive user profiles, which is reflected in a lower probability to re-identify users by their behavioural profile (b)Back to article page