Abstract: Disclosed is an apparatus performing a method including: receiving, by a decision unit coupled to a plurality of sensors at least partially supported by a housing which holds a personal communication device, trait data of a user of the personal communication device and determining whether or not a first authentication score generated based on a first set of trait data and a first set of weights assigned to the first set of trait data is above a pre-determined threshold. In some embodiments, the method includes providing a challenge to the user based on a determination that the first authentication score is below the pre-determined threshold, and gating electronic access to the personal communication device based on whether or not a second authentication score generated based on a second set of trait data and the first set of weights is above the pre-determined threshold.