A computer-implemented method for data segmentation to improve security is described. The method includes receiving a request, from a client device of a user, for authentication information; parsing the request; based on the parsing, determining an authentication score that represents a likelihood that the request is from an authenticated device; determining, from the authentication score, a number of segments into which the requested authentication information is divided; and for each of the segments, assigning one or more portions of the authentication information to that segment, in which each segment is associated with one or more times at which to transmit information assigned to that segment, and at one or more times specified by that segment, transmitting one or more portions of the authentication information assigned to that segment to the client device.