| 摘要 |
<p>An information reproducing method comprises reading (S12) purchase type information and license authentication information, identifying (S20, S24) the read purchase type information, when the purchase type is a rental, transmitting (S26) the read license authentication information to an authentication server to cause the authentication server to perform license authentication, receiving (S28) reproduction time limit information transmitted from the authentication server, when the reproduction time limit is valid, determining (S30) whether or not a key has been acquired, when the key has not been acquired, requesting (S36) a key management server to issue a key, and reproducing (S44) the encrypted content by using the key.</p> |
