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:
Jan. 13, 2009
Filed:
Jun. 06, 2002
Robert Schipper, Eindhoven, NL;
Robert Schipper, Eindhoven, NL;
Irdeto Eindhoven B.V., Eindhoven, NL;
Abstract
Device (), smart card () and method for selectively supplying access to a service () encrypted using a control word. A service () is received with an entitlement control message (ECM) () comprising authorization data and a specifier of a validity period of the authorization data. The service is decrypted only if the ECM () is found valid. The service () can be stored on a storage medium such as a DVD. An ECM transcoding module () obtains the authorization data from the ECM () supplies to writing means () a device-specific ECM comprising the authorization data. The device-specific ECM may be encrypted with a key specific to the device () and/or comprise an identifier for the device ().