Systems, methods and computer products for profile-based identity verification over the Internet. Exemplary embodiments include a method for profiling a user on a network, the method including receiving an input of streams corresponding to network activities associated with the user, wherein the input of streams are received from one or more layers of the network, in response to receiving a request to supply specified-input, receiving a score function and a list of attributes to be monitored, classifying the input of streams into network-activity classifications, extracting values and attributes for the network-activity classifications, and placing the extracted values and attributes into data sets, calculating a score of the data sets, comparing the data sets to a database of activity-specific attributes and mapping the data sets to a class of individuals based on a value of the score and the comparison of the database of activity-specific attributes.