Fragile watermarking with permutation code for content-leakage in digital rights management system

In this paper, we present a new scheme of digital rights management (DRM) system employing the fragile watermarking with permutation code for the image distribution via network. General DRM systems are designed to protect the copyright of contents and to trace the source of the illegal distributors based on the user-side watermarking. However, in the typical DRM systems, the original digital contents are temporarily disclosed without the watermarking information inside user’s system by the decryption process. Therefore, the user can copy the leaked original content inside the system and illegally redistribute via network without the permission of the content providers. Our work describes the idea of a DRM method which is composed of the incomplete cryptography based on permutation codes and user identification mechanism to control the quality of digital contents. There are two fundamental steps in our proposed cryptography: incomplete encoding and incomplete decoding. These two steps will create the scrambled content that is used as trial content and the watermarked content that is used to prevent unauthorized duplication or business of digital contents, respectively. Experimental results show that the proposed method is suitable for DRM in the network distribution system.     

Integration of digital rights management into the Internet Open Trading Protocol

Although digital rights management (DRM) has gained increasing importance in today's digital services and electronic commerce, it is not addressed explicitly in the Internet Open Trading Protocol (IOTP) specification. In this paper, we propose a digital rights management system (RMS) that is integrated into IOTP for electronic commerce applications and services. We introduce a rights insertion phase and a rights verification phase for IOTP. In the proposed framework, digital watermarking plays a very important role in facilitating digital rights management. The proposed digital rights management system was implemented on an online music web site and the proposed concepts and approaches proved to be successful.     

A proposal of digital rights management based on incomplete cryptography using invariant Huffman code length feature

Digital rights management (DRM) system is a promising technique to allow copyrighted content to be commercialized in digital format without the risk of revenue loss due to piracy. However, traditional DRMs are achieved with individual function modules of cryptography and watermarking. Therefore, all digital contents are temporarily disclosed in perfect condition via decryption process in the user-side risking illegal redistribution. This paper describes the basic idea of a novel DRM method composed of an incomplete cryptography using invariant Huffman code length feature and the user identification mechanism to control the quality of digital contents. The proposed incomplete cryptography consists of two processes: the incomplete encoding and the incomplete decoding. These processes are presented by randomly selecting the coefficients that belong to the same category or different category of Huffman code. In our scheme, the copyright information is embedded into the decoded content during the decoding process, and the size of digital contents are invariant during the process. Experimental results with simulation confirmed that the modified codes are compatible with standard JPEG format, and revealed the proposed method to be suitable for DRM in the network distribution system.     

基于线性同余的数字图像置乱与数字水印技术

为了实现数字图像的安全保密,提出了一种数字置乱加密技术和数字水印植入技术.探讨一类特殊的图像矩阵变换--Lebmer提出的线性同余模型,将线性同余模型扩展为数字图像的位置置乱加密算法,根据线性同余的规则提出了一种新颖的数字水印植入技术.实验结果表明,该算法可以在一定程度上满足数字图像加密和隐藏的鲁棒性要求.     

一种新的基于三级加密的流媒体DRM模型

分析了流媒体数字版权保护（DRM）的一般框架及其存在的问题，结合流媒体的特点，提出了一种新的基于三级加密的流媒体DRM模型——时分变码流媒体DRM。介绍了时分变码流媒体DRM的框架、流程，以及时分变码加密机制，并分析了时分变码流媒体DRM的特点。该模型具有很好的安全性、实时性和可升级性。     

A digital rights management scheme for broadcast video

Many watermarking techniques have been proposed for digital video and digital broadcast video. In general, they address the seller's or broadcaster's concerns, such as copyright-violation deterrence, copyright-violation detection and copy protection. Some of them provide for data integrity (tamper proofing), which is a shared concern of both subscriber and broadcaster. In all these cases, the watermark generation and embedding is performed or controlled by the seller or broadcaster. Therefore, a broadcaster with malicious intentions could, with manipulation, falsely implicate an innocent subscriber in copyright violation. This could be a major concern for subscribers. In this paper, we propose an integrated solution to manage the broadcaster's copyright and subscriber's false-implication concern (subscriber's rights) for digital video broadcasts. The proposed novel approach makes use of interactive watermarking techniques and protocols to help protect digital rights of all parties involved in video broadcasting.     

流媒体版权管理系统的研究与实践

媒体版权管理技术(DRM)是网络环境下流媒体内容交易和传播的重要技术,用于保护流媒体内容的版权,控制流媒体的使用和传播.结合现阶段网络应用中流媒体认证技术的实际应用情况和新一代数字版权管理(DRM)技术,提出一个通用的流媒体数字版权保护架构,并最终实现了基于该方案的流媒体版权管理系统.     

The good, the bad, and the ugly: what might change if we had good DRM

Various vendors claim to have solved the online piracy problem in manners that can enable the safe sale of information to Web users. The technologies they sell include watermarking, hardware key "dongles", encryption and monitoring. The major place people worry about digital rights management's (DRM) impact is with existing Web sites that provide free information. Whatever benefits it might bring, DRM software's downside will undoubtedly include the collection of large amounts of user data that could prove valuable to marketers, snoopers, and others besides those who sell online content.     

DRM cloud framework to support heterogeneous digital rights management systems

The DRM(digital rights management) techniques have been rapidly developed to protect the digital media contents. The growth of smart device and cloud computing makes the environment in which various services can be provided anywhere and anytime, so the DRM technologies have to react to such changes. From this aspect, we previously proposed the architecture of DRM-as-a-Service that provides various functionalities of DRM as some services on the cloud environment, and we referred to it as the DRM Cloud. In this paper, we define a reference model of DRM Cloud to represent some DRM functions that are provided by the DRM Cloud, and several service scenarios are proposed on the DRM Cloud. Also we simulate the DRM Cloud on the testbed and then discuss some security issues and how to handle the interoperability in the DRM Cloud. We conclude that the DRM Cloud allows the content consumers to use many contents with various smart devices, also let the DRM developers and the content service providers reduce the costs of development and business.     

互融DRM：数字版权管理的新进展

传统数字版权管理（Digital Rights Management,DRM）技术所涉及的安全、可信、可控理论与方法,已无法满足新兴的云媒体社交网络下媒体内容安全与版权保护这一实际应用需要.深入分析了云媒体社交网络及其层次化体系结构,综述了DRM系统跨平台使用、内容共享和消费电子设备互动等关键技术,最后针对新兴的云媒体社交网络场景及应用,提出了数字版权管理的新概念——互融DRM,并指出了亟待解决的开放问题和挑战.     

Production Protection to Copy(right) Protection: From the 10NES to DVDs

Much of what modern digital rights management (DRM) systems attempt to accomplish was actually forcefully implemented on videogame consoles beginning with the Nintendo Entertainment System (NES) and SEGA Genesis system in the early 1980s. Examining the links between modern DRM mechanisms and these early production and copy protection systems can help contextualize the future of media production and access.     

基于动态逻辑许可证的PDF版权管理系统

电子文档版权管理是数字版权管理的重要研究领域,提出一种PDF电子文档版权保护方案,该方案的权限管理基于一种具有强大表达力、灵活性和开放权限管理能力的动态逻辑许可证,具有详细的文档权限控制方法,并通过内容级的PDF文档加密方法增强文档的安全性。对系统模型、实现结构和方法进行说明,并与相关方法进行对比和应用示例。     

一种基于CRT与PCA的数字水印算法

数字水印是一种将特殊信息嵌入媒体数据中的技术,通常应用在数字图像、音频、视频以及其它媒体数据的版权保护和完整性验证方面,其中图像数字水印技术是研究的一个重点。提出了一种将中国剩余定理与主成分分析方法相结合的图像数字水印算法,并且在Matlab中实现了该算法。实验结果表明,相对于最低有效位算法,该算法有很好的不可感知性,对常见的攻击方式,如图像压缩、加噪、中值滤波和剪切等具有较强的鲁棒性。     

数字水印安全性攻击的特点分析

数字水印是近年来出现的数字产品版权保护技术,目的是保护数字产品的合法拷贝和传播。数字水印研究主要分为算法设计和攻击分析两个方面。该文较为系统地分析了当前关于数字图像水印的常用攻击方法,讨论了数字水印技术未来可能出现的研究热点。     

手持设备上可变运动矢量的多媒体版权方案

提出了一种新的视频数字版权管理（DRM）方案，它能针对手持移动设备的计算特点而修改宏块中的运动矢量参数。实验结果表明该方法不仅能在加解密过程中占用较少的系统处理资源，而且使得能对诸如便携式多媒体播放器与个人数字助理等类型的手持移动设备分别进行单独鉴定认证。     

基于P2P系统信任机制的DRM模型

P2P技术的成熟同时也给数字内容的版权保护带来更大的挑战.传统C/S模式下的DRM已不能满足P2P环境下的数字版权保护.结合现阶段网络技术中P2P技术的实际应用情况和新一代数字版权管理(DRM)技术,提出了基于P2P系统信任机制的版权管理模型.该模型通过秘密共享思想将许可证密钥分发给P2P网络中的可信任节点,为基于P2P技术的数字内容分发提供了必要的安全保障.通过分析与仿真实验表明,该模型较现有数字版权管理模型在传输的容错性、入侵容忍性与安全性方面都有较大的提高.     

基于密码技术的Android平台数字媒体版权管理系统

针对电子商务领域数字媒体版权保护的需求,给出一种数字媒体版权管理（DRM）系统框架。基于Android平台,对版权管理系统涉及的DRM内容格式及权利对象文件进行设计,给出系统的工作流程。最后,给出了系统的测试结果,并分析了系统的主要特点。     

个性化DRM和数字水印技术

提出了一种视频的个性化的数字版权保护和数字水印技术,针对每个用户采用不同加密密钥和水印信息,提高了安全性和事后追查能力.把音视频文件分离为非关键数据文件和小数据量的关键数据文件,对关键数据进行个性化加密和嵌入数字水印来降低计算量和存储量问题.前端系统把多版本的加密关键数据文件和共同的非关键数据分别存放和发布,客户端播放器把两种数据流进行同步、解密和合成,然后解码播放.     

多媒体数字产品版权保护模型研究与设计

非法的盗版行为侵害了创作者的合法权益,使得多媒体信息的版权保护问题变得十分重要。通过分析一般的版权保护管理系统,提出了一种有效保护多媒体信息版权的模型。该模型综合利用鲁棒水印和脆弱水印对多媒体信息进行4次水印嵌入;采用全文件加密的方式对多媒体信息加密;使用基于双缓冲机制及安全存储机制的专门的客户端软件对信息解密。最后通过性能分析可知,在没有降低系统的权威性、公平性、实用性的前提下,该模型提高了整个DRM系统的安全性。