METHOD FOR MANAGING THE RIGHTS OF AN ENCRYPTED CONTENT STORED ON A PERSONAL DIGITAL RECORDER

摘要

the encrypted event is stored, along with the control messages (ECM), on the storage unit; the control messages (ECM) are transmitted to the security unit (SC); verification occurs as to whether the access rights to said event are contained in the security unit (SC), if this is the case, a receipt (Q) is provided for all or part of the control message (ECM) by means of a secret key (K) which is contained in the security unit (SC) and is proper to each security unit; said receipt (Q) is stored on the storage unit.