| 摘要 |
A communication system include: a first acquisition unit configured to acquire request information of session initiation and authentication information of session participation,; a session management unit configured to establish the session between the first terminal and the second terminal; a second acquisition unit configured to acquire request information of session participation and the authentication information of session participation being input by a third terminal; and a participation determination unit configured to compare the authentication information of session participation obtained by the first acquisition unit with the authentication information of session participation obtained by the second acquisition unit, and the participation determination unit allowing the third terminal to participate in the session when the authentication information of session participation obtained by the first acquisition unit is identical to the authentication information of session participation obtained by the second acquisition unit. |
