Patent ID: 8738899

Claim:
A system for unlocking a content associated with a printed media, the system comprising: a server memory configured to store a media database having a plurality of addresses each associated with one content unit from a plurality of content units located in the printed media; and a server processor configured to execute an authentication module residing in the server memory, the authentication module configured to: provide a challenge to a user, wherein the challenge includes at least two addresses from the plurality of addresses to the user; request, from the user, to provide response data corresponding to each of the at least two addresses from the printed media; receive, from the user, the response data in response to the challenge; compare the response data with a combined content unit associated with combining content units for each of the at least two addresses from the plurality content units in the memory, wherein the combined content unit is obtained by concatenating content units associated with the at least two addresses; and unlock the content associated with the printed media if the response data matches the combined content units.