Patent ID: 8443206
Filing Date: 2013-05-14
Classification: G06F,H04L

Abstract:
1. A method of managing digital rights using a multimedia card, the multimedia card configured to be connected to and disconnected from at least a first user device and a second user device, the method comprising: registering the multimedia card with a domain on which the first user device and the second user device are registered; performing authentication between the multimedia card and the first user device to establish a first security association that is part of an authentication protocol established between the multimedia card and a license provider; after establishing the first security association, moving a first license received from the license provider from the first user device to the multimedia card; performing authentication between the multimedia card and the second user device to establish a second security association that is part of an authentication protocol established between the multimedia card and the license provider; after establishing the second security association, moving a second license received from the license provider from the second user device to the multimedia card; wherein both the first user device and the second user device are permitted to use the first license from the multimedia card in order to use the content associated with the first license and to use the second license from the multimedia card in order to use content associated with the second license; performing primary authentication between the first user device and the license provider to establish a primary security association; performing secondary authentication between the first user device and the multimedia card to establish a secondary security association that comprises the first security association, wherein as a result of performing the primary and secondary authentications, the multimedia card executes the authentication protocol with the license provider; and while performing the authentication protocol: receiving the first license by the first user device from the license provider; and moving the first license from the first user device to the multimedia card, wherein the first user device and the multimedia card share a common key created after the primary authentication and the secondary authentication and perform moving the first license using the common key.