| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent an interruption of continuous reproduction for an acquisition process of a session key when plural contents are reproduced continuously. <P>SOLUTION: A contents reproduction device determines that whether the remaining time of validity of a session key is shorter than the total reproduction time of the continuously-reproduced plural contents or not when the plural contents are reproduced continuously. When the remaining time of validity of the session key is determined as shorter than the total reproduction time of the continuously-reproduced plural contents, a new session key is acquired from a server and then the new session key is used to reproduce the plural contents continuously. When the remaining time of validity of the session key is determined as equal to or longer than the total reproduction time of the continuously-reproduced plural contents, the current session key is used to reproduce the plural contents continuously without acquiring a new session key from the server. <P>COPYRIGHT: (C)2012,JPO&INPIT |
