公开(公告)号：US09807437B2

公开(公告)日：2017-10-31

申请号：US14868127

申请日：2015-09-28

Applicant: Core Wireless Licensing S.a.r.l

Inventor： Tero Reinikainen ,  Henri Hämäläinen ,  Arto Kiiskinen

IPC: H04N7/16 ,  H04N21/254 ,  G06F21/10 ,  H04H60/14 ,  H04N21/414 ,  H04N21/4627 ,  H04H60/40

CPC classification number: H04N21/2541 ,  G06F21/10 ,  H04H60/14 ,  H04H60/40 ,  H04H2201/37 ,  H04N21/41407 ,  H04N21/4627

Abstract: A method, system, mobile device, apparatus and computer program product are provided for accurately determining whether one or more rights objects associated with a mobile device are valid. In particular, a secure time source (e.g., DRM clock or time) may be maintained by the mobile device and used to check the validity of the one or more rights objects. In order to ensure that the secure time source or clock remains accurate, the mobile device may update the secure time source by regularly requesting and receiving the DVB-H network time from a DVB-H network entity. Because the DVB-H network time is secure, accurate and readily accessible, it provides an ideal tool for correcting possible drift in the mobile device's secure time source.