NAGRA, a Kudelski Group announced that SK Broadband, one of broadband Internet access providers in South Korea, has selected NAGRA's NexGuard forensic watermarking technology to protect the operator's premium content on a wide range of IPTV set-top boxes. The NexGuard Pay-TV solution protects premium content investments and, in the event of a breach, will enable the operator to trace any illicit recording or sharing of content from its BTV service and identify the set-top box from which it originated.