On digital video watermarking using unequal error protection and

数字视频水印的不等差错保护和

• 批准号: 10450147
• 负责人: IMAI Hideki
• 金额: $ 7.81万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10450147/
• 关键词: Copyright protection; Digital watermark; Information security; Multimedia; Network; Electronic commerce

Study on the relation between image distortion and channel capacity of digital watermarkingBy simplifying the model of the digital watermarking, we theoretically investigated the relation among the difficulty of removing a digital watermark, the amount of embedded information and the distortion of the image. As a consequence, we obtained the relation between the channel capacity of a digital watermark (the amount of remaining in formation after an attack) and the distortion of the image.Study of asymmetric digital watermarkingWe proposed an idea of asymmetric digital watermarking where embedding algorithm is not the same as extracting one. That ensures the difficulty of removing a digital watermark even if the extracting method is open to the public. A concrete method was proposed and then its resistance was evaluated against some attacks.Study on efficient digital movie watermarkingWe proposed a digital watermarking method suitable for MPEG movie that requires no original image in the extraction phase. It embeds a watermark with small cost since it requires no decoding/re-encoding procedure in embedding. We evaluated its robustness against practical attacks, such as re-encoding attacks and signal processing attacks. Using patchwork technique with watermarking, it became robust against geometric attacks, such as rotation.Study on a secure content-distribution protocol and a secure traitor-tracing scheme against malicious providersWe proposed a secure information-distribution protocol that can trace a traitor who leaked the distributed information. And then, we proposed applying it to both a secure content-distribution protocol and a secure traitor tracing scheme which are secure against malicious providers.

图像失真与数字水印信道容量关系的研究通过对数字水印模型的简化，从理论上研究了水印去除难度、嵌入信息量与图像失真之间的关系。在此基础上，得到了数字水印的信道容量（攻击后的剩余信息量）与图像失真之间的关系。非对称数字水印的研究提出了一种嵌入算法与提取算法不同的非对称数字水印的思想。这确保了即使提取方法对公众公开也难以去除数字水印。提出了一种适用于MPEG电影的数字水印算法，该算法在提取阶段不需要原始图像，并且能够有效地对MPEG电影进行数字水印嵌入。它嵌入水印的成本很小，因为它不需要解码/重新编码过程中嵌入。我们评估了它对实际攻击的鲁棒性，如重新编码攻击和信号处理攻击。提出了一种安全的内容分发协议和一种针对恶意提供者的安全的叛逆者追踪方案，该方案能够追踪泄露分发信息的叛逆者。然后，我们提出了将其应用到一个安全的内容分发协议和一个安全的叛逆者追踪方案，这是安全的对恶意提供者。

项目成果

M.Breitbach,H.Imai: "Rate-Distortion Functions in Watermarking of Digital Still Images"第21回情報理論とその応用シンポジウム予稿集. 515-519 (1998)

M.Breitbach、H.Imai：“数字静态图像水印中的率失真函数”第 21 届信息理论及其应用研讨会论文集 515-519 (1998)。

馬場 健介,今井秀樹: "プロバイダ側での不正行為を考慮したエーェントを設けない不正ユーザ追跡法"マルチメディアネットワークのための高度情報セキュリティ技術シンポジウム.日本学術振興会. (1999)

Kensuke Baba、Hideki Imai：“一种在不考虑提供商方面欺诈的情况下跟踪未经授权用户的方法”日本多媒体网络高级信息安全技术研讨会（1999 年）。

山口和彦,石村恵市,今井秀樹: "誤り訂正符号を用いたアルゴリズム 公開型電子透かし"1999年暗号と情報セキュリティシンポジウム講演論文集. 713-718 (1999)

Kazuhiko Yamaguchi、Megumi Ishimura、Hideki Imai：“使用纠错码进行公共数字水印的算法”1999 年密码学和信息安全研讨会论文集 713-718 (1999)。

T.Mori, H.Imai: "Evaluation of a watermarking scheme based on the Steerable Pyramid" Proceedings of Symposium on Cryptography and Information Security '99 (SCLS '99). 223-227 (1999)

T.Mori、H.Imai：“基于可操纵金字塔的水印方案的评估”密码学和信息安全研讨会 99 (SCLS 99) 论文集。

K.Baba,K.Kobara,K.Iwamura.Y.Zheng.H.Imai: "An Interactive Protocol for Image Fingerprinting"電子情報通信学会技術研究報告. ISEC98-7. (1998)

K.Baba、K.Kobara、K.Iwamura.Y.Zheng.H.Imai：“图像指纹的交互式协议”IEICE 技术报告（1998）。