A content transmission device for transmitting content, whose copying is controlled, includes an authentication section for performing an authentication procedure between the content transmission device and a content receiving device, a first copy-control-information processing section for processing first copy control information describing copy control information concerning the content, a second copy-control-information processing section for processing second copy control information including content information different from the first copy control information, and a content transmission section for generating and transmitting, to the content receiving device, a packet including a header including the first copy control information and the second copy control information, and a payload obtained by encrypting the content with a predetermined content key.