同時保障買賣雙方權益的數位影像權利管理系統

普及而且完美的複製以及透過網路進行迅速或即時的傳播是數位化多媒體內容影響業界最大的兩項成就，這兩項成就一方面使得數位化多媒體內容在製造、傳輸以及買賣上有著前所未有的彈性；另一方面，從數位內容盜版犯罪者的角度觀之，普及且完美的複製技術讓快速生產大量盜版的困難度與成本皆大幅下降；網際網路的便利更讓盜版數位內容的傳播一舉跨越了地域性與運輸成本的限制。正因如此，在數位權利管理系統方面的研究也就日趨受到重視。在這篇論文中，我們結合密碼學、數位浮水印、數位影像處理等多種技術，實作出一個針對數位影像的權利管理系統。此外，我們相信一個真正的權利管理系統應該必須是公平的保障買賣雙方的權益，而為了達到這個訴求，用於證明智慧財產權的數位浮水印必須有特殊的考量，那就是不能以傳統的方式完全的由賣方來完成浮水印嵌入的動作，所謂「買者賣者浮水印嵌入協定」是我們的系統在保障買賣雙方權益方面所採取的解決方法。然而就實際應用而言，完完全全的靠技術面來解決保障智慧財產權的議題是不可能的。技術面或野i以針對一般社會大眾有某種程度的保護效果，但是對於專業級的罪犯幾乎可說是一籌莫展、防不慎防。這個時候就必須要依賴法律層面的防備，彌補技術面的不足，針對專業級的罪犯予以赫阻的作用。因此，我們認為，只有同時結合技術面與法律面的保護，才有可能締造出一個智慧財產受到保障、沒有盜版問題的環境。

關鍵字

密碼學；買者賣者浮水印嵌入協定；數位權利管理系統；數位浮水印

並列摘要

Universal perfect replication and instant world-wide distribution are two most influential achievements to digital content. On the one hand, they give an extremely flexibility to content production, transportation, and consumption; on the other hand, the risks to pirate are eased. Thus, there's an eager need for reliable and trustful Digital Rights Management to give content providers a piracy-free environment. In our work, we practically built a DRM system aims at digital images by integrating various technologies, including cryptography and digital watermarking. Additionally, we believe the central idea of DRM is to collectively protect entire life cycle of contents, so that buyers' right cannot be invaded while protecting sellers'. Therefore, we suggest the separation of watermarking generation and embedding in order to assure both buyers' and sellers' rights, i.e. we embed digital watermarks via buyer-seller watermarking protocol. Nevertheless, it's insufficient for technical protections to challenge DRM alone. Technical protection mainly focuses on those general users, but is ineffective to professional criminals. On the other hand, legislative protections complements the shortcomings of technical protections that deter the professional criminals. Therefore, we conclude that the piracy-free environment is likely to exist only under those protections that combine both technological measures and legal provisions.

並列關鍵字

Digital Rights Management ； digital watermarking ； buyer-seller watermarking protocol ； cryptography

參考文獻

[1] B. Rosenblatt, B. Trippe, and S. Mooney, Digital Rights Management : Business and Technology. New York : M&T Books, 2002.

[2] J. Lee, S. O. Hwang, S.-W. Jeong, K. S. Yoon, C. S. Park, and J.-C. Ryou, "A DRM Framework for Distributing Digital Contents through the Internet," ETRI Journal, vol. 25, no. 6, pp. 423-436, Dec 2003.

[5] B. Schneier, Applied Cryptography : Protocols, Algorithms, and Source Code in C, 2nd ed. New York : Wiley, 1996.

[6] R. L. Rivest, A. Shamir, and L. Adleman, "A Method for Obtaining Digital Signatures and Public-Key Cryptosystems," Communications of the ACM, vol. 21, no. 2, pp. 120-126, Feb. 1978.

[13] I. J. Cox and M. L. Miller, "The first 50 years of electronic watermarking," EURASIP JASP, vol. 2, pp. 126-132, 2002.

國際替代計量

同時保障買賣雙方權益的數位影像權利管理系統

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