在FLASH與HTML檔案中作主動式資訊隱藏之研究

Abstract

隨著多媒體科技與網際網路的快速發展，越來越多的多媒體資料被展示在網路上，本論文主要針對Flash與Html文件，利用資訊隱藏和數位浮水印技術在個人電腦的操作平台上作版權保護、秘密通訊、與驗證之研究與應用。在版權保護方面，我們在Flash檔案中隱藏一種主動式的版權資訊，當Flash檔案遭到非法下載或是濫用時，會主動地將可視的版權資訊表現出來。在秘密傳輸方面，我們將秘密訊息隱藏在Flash檔案中，再透過網頁安全地將其傳送，並且提出了驗證其中秘密訊息是否遭到竄改的方法。對於Flash檔案內容是否遭到竄改，我們也提出讓Flash檔案主動地自我驗證。最後，我們提出了對Html檔案中的文字的主動式保護方法，當Html檔案遭到非法下載或是複製時，會主動地將可視的版權資訊表現出來。我們提出了對相關的實驗結果證明了所提方法的可行性。

With the advance of multimedia technologies and the popularity of computer networks, more and more multimedia information is displayed on public networks. In this study, we investigate information hiding applications of copyright protection, secret communication, and authentication on the personal computer platform. The cover media we deal with are flash and html files. For copyright protection, we hide active information into the flash file. If the flash file suffers from illegal downloading and misuses, a visible copyright watermark will be displayed actively. For covert communication, we hide secret messages into flash files, and then transmit the files through web pages. We also propose an authentication method for verifying the integrity of embedded secret messages. Furthermore, an authentication method is proposed to verify actively the fidelity of flash files. Finally, we propose a method for protection of the texts of html files. When an html file suffers from illegal downloading and copying, visible copyright information will be displayed actively. Good experimental results show the feasibility of the proposed methods.