Abstract: A computer-implemented method of identifying unauthorized logins may include: receiving a login request from a user device; using a machine learning model, generating a score corresponding to the login request, the machine learning model being trained to learn associations between identification data associated with login requests and scores based at least on (i) a set of prior login requests and (ii) a set of login classifications, each of the set of login classifications corresponding to at least one of the set of prior login requests; determining whether the score exceeds a predetermined score threshold; and in response to a determination that the score exceeds the predetermined score threshold, rejecting the login request and prompting a user of the user device to submit a renewed login request.