A content management system which carries out a process for allowing content data for reproducing content to be used in a second communication terminal in place of a first communication terminal includes an authentication unit that authenticates that the second communication terminal is a takeover terminal which is a communication terminal which takes over rights to use the content from the first communication terminal and a rights information transmission unit that, in the event that it is authenticated that the second communication terminal is the takeover terminal, transmits second rights information which is necessary in order to use the content data, and which is valid only for the second communication terminal, to the second communication terminal.