Method for managing the rights of an encrypted content on a personal digital recorder

摘要

Method for managing the rights of a content encrypted in a digital recorder staff ".The objective of this invention is to provide a method of storage of an event encrypted by control words (CW), which provides access to the event at any time desired, even if certain modifications in the designation of identifiers of these events occurred at the time of Storage and at the time of the display.This goal is achieved by a method of storage of this event in the unit of reception and descriptografau00e7u00e3o (CTB) connected to a security unit (SC), the said control words (CW) and the necessary rights being contained in control messages (ECM). By the fact that comprise the following steps: storage of the encrypted event.As well as the control messages (ECM) in the storage unit; the transmission of control messages (ECM) for the security unit (SC); checking whether the access rights to that event are contained in the security unit (SC); if this is the case, the determination of a re Cebimento (q) of all or part of the control message (ECM)Thanks to a secret key (k) contained in the security unit (SC) and specific to each unit of security; storage of the receipt (q) in the storage unit.