所謂雙網整合(WLAN/Cellular Networks),即結合無線區域網路與行動網路。在此環境下使用者可透過雙網手機上網購買並下載多元化的多媒體數位內容服務(例如,MP3 Music, Video及Mobile TV Program等)。利用數位版權管理(Digital Rights Management; DRM)技術來保障數位內容提供者的智財權使其不被非法複製或散佈,則是實現此服務的重要基礎。然而現存之DRM系統多以裝置為認證主體(device-based),但實際上使用者擁有多台行動裝置的現象非常普遍且對裝置的汰舊換新也很常見。因此本文提出一個在雙網環境下能基於使用者身份為認證主體(identity-based)之數位版權管理系統,期能更符合消費者使用行為並同時保障數位內容流通之安全性。
On WLAN/Cellular Networks, users can purchase and download digital media content including MP3 music, video, and mobile TV programs by WLAN/Cellular dual mode handsets. Utilization of Digital Rights Management (DRM) Technology guarantees the intellectual property rights for those digital content providers. However, DRM systems nowadays are generally device-based. Users may have many handsets and frequently replace their old handsets with new ones. In this article, we propose an identity-based digital rights management system on WLAN/Cellular networks to assure security of digital media content.