1. A computer-implemented method for analyzing a first digital interaction, the method comprising acts of: identifying an anchor value X from the first digital interaction; identifying a first plurality of past digital interactions from which the anchor value X was previously observed, wherein each past digital interaction of the first plurality of past digital interactions has associated therewith a respective sameness score; select a second plurality of past digital interactions from the first plurality of past digital interactions based at least in part on the respective sameness scores; generating a profile for the anchor value X based on the second plurality of past digital interactions, wherein: the profile comprises historical information regarding each attribute of a plurality of attributes; and the plurality of attributes are selected based on measurements taken from the second plurality of past digital interactions; for at least one attribute A 1 of the plurality of attributes, determining a value V 1 based on one or more measurements taken from the first digital interaction, wherein the one or more measurements relate to a physical interaction between a user and a device; and determining a biometric score for the first digital interaction at least in part by comparing the value V 1 of the at least one attribute A 1 against the historical information regarding the at least one attribute A 1 .