Now, the attacker runs the protocol and in its pairing message it gets E E Km. It provides for an encrypted connection between a content outputting device like a Blu-ray player, cable box, or streaming device on one end and a receiving device like an HDTV or audio-video receiver on the other end. The on-screen menus while the video content is loaded. For interlaced video, every field is an HDCP frame. Engadget said the attacker may have used the method proposed by Crosby in to retrieve the master key, although they cited a different researcher.