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:
Aug. 01, 2017
Filed:
Jun. 30, 2015
Vodafone Gmbh, Düsseldorf, DE;
Marnix Vlot, Düsseldorf, DE;
Christoph Schaaf, Düsseldorf, DE;
Vodafone GmbH, , DE;
Abstract
The invention relates to a device for decrypting protected content and for providing the decrypted content for playback, the device comprising a secure module for carrying out cryptographic operations including the decryption of the protected content using decryption information, and the device being configured to install therein at least one client software module assigned to a provider of protected content, the client software module being adapted to forward decryption information for decrypting the protected content of the provider to the secure module in an encrypted form. The secure module is adapted to store therein a public key assigned to the provider and to authenticate at least one link key provided by the content provider using the stored public key. Further, the secure module is adapted to receive a protected software image of the client software module and to initiate the installation of the client software module in the device upon having decrypted and/or validated the software image by means of a link key authenticated using the registered public key or by means of a key of a key ladder derived from the authenticated link key, and, during execution of the installed client software module, the secure module is adapted to decrypt the decryption information by means of a link key authenticated using the registered public key or by means of key of a key ladder derived from the authenticated link key. Moreover, the invention relates to a method for operating the device.