AN AUTHENTICATION TOKEN WHICH IMPLEMENTS DRM FUNCTIONALITY WITH A DOUBLE KEY ARRANGEMENT

摘要

The invention relates to a personal token (20) for playing Digital Rights Content on a mobile rendering device (10), the personal token (20) comprising a service key (SEKsim) for contributing to decryption of a traffic key which encrypts the Digital Rights content, the personal token (20) also storing a service key (SEKhandset) for the handset and delivering such service key (SEKhandset) to the handset for the handset to perform a contribution to decryption of the traffic key with the said service key (SEKhandset) of the handset. characterized in that the service key (SEKsim) of the personal token (20) remains secret to the handset.