SECTION 1(A) BASIS: Collecting and processing user activity data from stationary and mobile Internet-connected devices, thereby to provide data which identify the various devices operated by individuals, users and persons, for purposes of cross-device targeted advertising, cross-device content personalization and cross-device analytics; SECTION 1(B) BASIS: Collecting and processing user activity data from stationary and mobile Internet-connected devices, thereby to provide data which identify the various devices operated by individuals, users and persons, for purposes of user authentication and fraud detection