A method and system for authenticating an Internet user identity by cross-referencing and comparing at least two independent sources of information. A first geographical location of a computer signature of an internet user is identified, and the geographical location of a communication voice device of said internet user is identified to determine a second location. The first and second locations are compared for geographical proximity to confirm the identity of the internet user. Based upon geographical proximity of said locations, a score may be assigned to the internet user, and access to a website or authorization to carry out a transaction may be allowed or limited based upon said score. Alternatively, additional authentication information can be required or access can be terminated.