近年來，由於網路、數位技術和儲存設備的迅速發展，使得電視產業演進趨向於數位化，以及多媒體家用平台(MHP)的發展促進了互動電視，但數位的本質是非常容易進行非法操作、修改、儲存和散佈。傳統的條件存取系統(CAS)已經無法滿足未來的電視商業形態，在機上盒(Set-Top Box)上仍然可以進行盜竊數位內容，再大量散播出去，造成數位產業鏈的損失。因此，數位產權管理(DRM)是一個很重要的技術解決數位內容保護和管理，而且，在整個數位內容生命週期間都受到此系統的管理和保護。我們運用行動移動聯盟(OMA)所提出的權利描述語言(REL)和架構去整合數位產權管理系統在數位電視產業上，以安全的角度去討論如何設計一個健全的數位產權管理系統，並且，放進數位付費電視的架構和場景中，討論在多媒體家用平台(MHP)上執行權利和管理。在我們的論文中，簡略的介紹密碼學，以及數位產權管理的一些概念和其相關組織與系統，並提出一個健全的數位產權管理架構在付費電視上，說明設計一個數位產權管理系統應當考量的一些安全需求。最後，我們使用OpenMHP去模擬數位產權管理系統架構在多媒體家用平台上，並且，針對在執行有限制(constraint)的許可證可能產生的重傳攻擊(replay attack)，提出一個可行的方法。

The current trend is already progressive toward digitalization in the television industry. The high-quality multimedia content broadcast from a DVB system need to be protected and managed in Multimedia Home Platform. Nowadays, the multimedia content protected under the conditional access broadcasting system is not enough for commercial modes in the future, and users can still pirate multimedia contents from a Set-Top Box to copy and redistribute the digital content. As a whole, there is no specification about how to enforce the usage rights of digital content in the television industry. In this thesis, we proposed a sound DRM model to protect multimedia contents which work on Multimedia Home Platform middleware from creation to termination. The model of DRM services proposing on digital pay-TV system is viewed at the high-level concept. Moreover, based on the nature of broadcasting, the stateful license may be attacked by replay attack. We implement the DRM model in OpenMHP and propose a possible method to solve the replay attack.

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