Sichere Multicast-Unicast-Inhaltsumwandlung

Details

Veröffentlichungs-Nr.

EP4794257

Anmeldetag

18. Februar 2025

Veröffentlichung

19. August 2026

Rechtsraum

EP

Abstract

The present disclosure provides a method for unicast transmission of encrypted multicast content. An adapter receives the encrypted multicast content along with multicast content-related information (e.g., usage rules) and securely receives protection information from an entity associated with a DRM server. The adapter generates a content key token containing at least one content encryption key (CEK) and the with multicast content-related information (e.g., usage rules), using the protection information to protect confidentiality and authenticity of at least part of the token. The adapter transmits the content key token to a device, enabling the device to request a DRM license including the CEK from the DRM server. The adapter then transmits the content encrypted with the CEK to the device in unicast mode. The method enables secure conversion of multicast content to unicast while maintaining end-to-end security between content access systems and DRM systems.

Anmelder

Firma

Nagravision Sàrl

Land

🇨🇭 Schweiz