The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 22, 2011
Filed:
Mar. 06, 2003
Claudia Becker, Rennes, FR;
André Codet, Rennes, FR;
Pierre Fevrier, Saint Sulpice la Foret, FR;
Chantal Guionnet, Cesson Sevigne, FR;
Claudia Becker, Rennes, FR;
André Codet, Rennes, FR;
Pierre Fevrier, Saint Sulpice la Foret, FR;
Chantal Guionnet, Cesson Sevigne, FR;
Viaccess, Paris la Defense, FR;
Abstract
The invention relates to a protocol for disabling/erasing access rights to scrambled data. According to the invention, the access rights entered in an access control module comprise the following variables: right identification variable (R ID), action date variable (AD V) and right status variable (S V). The status variable can have one of three encoded values, namely enabled, disabled or erased right. The inventive protocol consists in: transmitting (A) at least one access right management message comprising the right identification variable (R ID), the action date variable (AD V) and the status assignment variable (S V), the latter corresponding to a enabled, disabled or erased right; assigning (B) the action date (AD V) of the message to the action date (AD V) of the right entered; and allocating (C) the status assignment variable (S V) of the message, corresponding to an enabled, disabled or erased access right, to the status variable (S V) of the entered access right. The invention is suitable for pay television.