-
公开(公告)号:US20050289634A1
公开(公告)日:2005-12-29
申请号:US11136727
申请日:2005-05-25
申请人: Akira Yoda , Makoto Hara , Syuji Ono , Koji Wada , Hajime Araya
发明人: Akira Yoda , Makoto Hara , Syuji Ono , Koji Wada , Hajime Araya
CPC分类号: H04N21/4143 , H04N5/85 , H04N7/17318 , H04N9/8042 , H04N9/8233 , H04N21/42646 , H04N21/458 , H04N21/4627
摘要: Illegal use of a playlist can be prevented. A laboratory generates a playlist and encodes the playlist with a public key. The encoded playlist is recorded in a DVD. When a user carries out reproduction using the playlist on a personal computer, the personal computer compares token information thereof and token information included in an access ticket issued by an access ticket issuing center according to the token information of the personal computer. The personal computer carries out the reproduction by decoding the playlist with the private key in the access ticket only in the case where the token information thereof agrees with the token information in the access ticket.
摘要翻译: 可以防止非法使用播放列表。 实验室生成播放列表并用公开密钥对播放列表进行编码。 编码的播放列表被记录在DVD中。 当用户使用个人计算机上的播放列表进行再现时,个人计算机根据个人计算机的令牌信息来比较其令牌信息和包括在由访问票发行中心发出的访问权限中的令牌信息。 个人计算机仅在其令牌信息与访问券中的令牌信息一致的情况下,通过用访问票中的私钥对播放列表进行解码来执行再现。