Token passing technique for media playback devices

摘要

A computer enabled method for controlling distribution of encrypted media content to a player (30) having an associated host device (20), the method comprising the acts of:
the player exchanging authentication data (1) with its host device;
receiving a token at the player from the host device in response to a token request;
sending identification data (5) from the player directly to an external source including the token; and
accessing at the player, in response to the received token, at least one key (6) received directly from the source by the player and relating to encryption or decryption of the media content to be distributed and an additional token for a subsequent request by the player for media content.