A content reproduction apparatus comprising: a reproduction control unit configured to control reproduction of a link-type content which represents a plurality of streams of a plurality of respective time axes that are linked, wherein the link-type content includes a plurality of linked scenarios, wherein each scenario represents a stream of a single time axis and includes content data and control information regarding reproduction of the content data on the time axis of the scenario; and a control information acquisition unit configured to (i) add common user authentication information commonly used in the scenarios of the content and user authentication information of a respective provider that provides the respective scenario which is unique to each said provider, to an acquisition request message used to acquire the control information, (ii) transmit the acquisition request message, and (iii) acquire the control information, wherein the reproduction control unit is configured to control the reproduction of the link-type content by reproducing the content data in accordance with the control information including event information used to transition from a current scenario to another scenario; wherein the event information includes bridge information that defines a user interface when the current scenario transitions to another scenario; wherein the reproduction control unit displays a bridge screen configured to transition to the another scenario based on the bridge information; and wherein the control information acquisition unit is configured to take over the common user authentication information of a user between ones of the scenarios involving different providers without a log-in operation being performed therebetween, such that when transitioning from a first scenario involving a first provider to a second scenario involving a second provider different from the first provider the control information acquisition unit is configured to take over the common user authentication information of the user so as to enable identification of the user without performing the log-in operation. a reproduction control unit configured to control reproduction of a link-type content which represents a plurality of streams of a plurality of respective time axes that are linked, wherein the link-type content includes a plurality of linked scenarios, wherein each scenario represents a stream of a single time axis and includes content data and control information regarding reproduction of the content data on the time axis of the scenario; and a control information acquisition unit configured to (i) add common user authentication information commonly used in the scenarios of the content and user authentication information of a respective provider that provides the respective scenario which is unique to each said provider, to an acquisition request message used to acquire the control information, (ii) transmit the acquisition request message, and (iii) acquire the control information, wherein the reproduction control unit is configured to control the reproduction of the link-type content by reproducing the content data in accordance with the control information including event information used to transition from a current scenario to another scenario; wherein the event information includes bridge information that defines a user interface when the current scenario transitions to another scenario; wherein the reproduction control unit displays a bridge screen configured to transition to the another scenario based on the bridge information; and wherein the control information acquisition unit is configured to take over the common user authentication information of a user between ones of the scenarios involving different providers without a log-in operation being performed therebetween, such that when transitioning from a first scenario involving a first provider to a second scenario involving a second provider different from the first provider the control information acquisition unit is configured to take over the common user authentication information of the user so as to enable identification of the user without performing the log-in operation.