Serving,Owning, Authoring

Service provider or creative – which is the architect's primary role? And what legal, economic and ethical implications does each aspect carry? Architect and theorist David Ruy examines evolving business models in the architectural profession, from forays into property management to a focus on intellectual property rights, and considers the complexities of copyright law in the digital era.     

数字水印技术的开发与应用

在引用了数字水印技术的有关定义以后，文中着重介绍了它的开发现状，标准制定及应用示例。     

A multipurpose audio watermarking algorithm with synchronization and encryption

We propose a new multipurpose audio watermarking scheme in which two complementary watermarks are used.Foraudio copyright protection,the watermark data with copyright information or signature are first...     

数字指纹协议的研究与发展

一、引言随着电子商务的发展,以无形的数字格式作为多媒体产品的发布形式将成为Internet上的主流方式。但由于软件产品的易拷贝性,对软件产品(如JPEG、GIF图像,应用程序,各种文档等)的盗版就变得异常容易。从目前的技术研究来说,在开放环境下要严格防止非法使用者的侵权拷贝是不太可行的。主要的研究方向集中在如何有效地追查非法拷贝源,即发     

数字水印在信息隐藏中的应用

随着因特网的日益普及，多媒体信息及流达到了前所未有的深度和广度，作品侵权也随之更加容易，篡改也更加方便，因此，如何保护数字产品版权越工受到人们的高度得视，如今，信息隐藏技术，特别是数字水印技术作为版权保护的重要手段，已得到广泛的应用，本文对数字水印技术进行了较全面的论述，包括数字水印的系统模型，特点，主要应用领域，算法分类以及数字水印可能遭受的攻击。     

一种基于DCT变换的数字水印技术

文章重点研究了基于DCT变换的数字水印技术,提出了一种水印算法,将二维图像作为水印嵌入到数字作品中,并且进行了验证,实验证明这种方法是可行的。     

计算机软件的法律保护

从计算机软件产业的基本概念和特征出发，介绍了世界上几种主要计算机软件保护模式，并对我国的计算机软件保护做出相应介绍，从而针对现阶段存在的不足，提出自已的看法。     

Effective watermarking scheme in the encrypted domain for buyer-seller watermarking protocol

In most watermarking schemes for copyright protection, a seller usually embeds a watermark in multimedia content to identify a buyer. When an unauthorized copy is found by the seller, the traitor’s identity can be traced by the embedded watermark. However, it incurs both repudiation issue and framing issue. To solve these problems, some buyer-seller watermarking protocols have been proposed based on watermarking scheme in the encrypted domain. In this paper, an enhanced watermarking scheme is presented. Compared with Solanki et al.’s scheme, the enhanced scheme increases effective watermarking capacity, avoids additional overhead and overcomes an inherent flaw that watermarking capacity depends on the probability distribution of input watermark sequence. Based on the security requirements of buyer-seller watermarking protocols, a new watermarking scheme in the encrypted domain with flexible watermarking capacity is proposed. It improves the robustness of watermark sequence against image compressions and enables image tampering detection. Watermark extraction is blind, which employs the same threshold criterion and secret keys as watermark embedding. Experimental results demonstrate that the enhanced watermarking scheme eliminates the drawbacks of Solanki et al.’s scheme and that the proposed watermarking scheme in the encrypted domain outperforms Kuribayashi and Tanaka’s scheme.     

网络内容安全分发与版权保护技术

信息的传播从印刷煤体内电子煤体过渡。首先简要讨论了网络上知识产权保护的问题以及相关的重要的产品,同时比较了几种基本的技术。对网络上的知识产权保护的计算结构给出了一个整体的概述。     

数字水印技术在印刷品防伪中的应用

防伪技术一直是人们关注的一个热点,针对印刷品盗版特定场合防伪存在成本较高的问题,在分析印刷扫描给电子图象带误差的基础上提出了一种用于印刷品防伪的数字水印技术,该方法中水印的添加采用了线性运算,而水印的提取则采用了阈值判断法,在提高算法的鲁棒性方面,水印的构造采用了简单但非常有效的重复构造法,另外,为了保证实验结果的稳定性,算法还采用了CIElab色彩空间,实验结果表明,在对参数优化后,该算法能较好的满足防伪的一般要求,同时与其他防伪技术相比,不仅大大减少了防伪成本,而且该算法还可用于普通证件的防伪。