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:
Jul. 17, 2018
Filed:
Aug. 26, 2015
Vodafone Gmbh, Düsseldorf, DE;
Marnix Vlot, Düsseldorf, DE;
Christoph Schaaf, Düsseldorf, DE;
VODAFONE GMBH, , DE;
Abstract
The invention relates to a method for accessing protected content provided to a client device, wherein the client device decrypts the content using at least one control word provided by a server device. In the method, (i) the client device sends a request message to the server device, the request message including a nonce, and the client device stores the nonce; (ii) upon receipt of the request message, the server device generates a control word message based on the control word and the received nonce; (iii) upon receipt of the control word message, the client device determines the control word from the control word message and validates the control word message using the stored nonce; and (iv) the client device uses the control word to decrypt at least part of the content in response to a successful validation of the control word message. Moreover, the invention relates to a client device and a server device for carrying out the method.