移动数字内容分发业务的版权保护管理

本文分析了移动数字内容分发业务版权管理的必要性,版权管理国际标准、解决方案及存在的问题.     

数字版权管理在移动应用中的解决方案

近年来无线增值业务迅猛发展，以数字媒体出现的内容产品倍受欢迎，与此同时数字内容易于非法复制、分发的特点使得对数字内容版权的保护成为影响移动应用市场发展的重要因素。论文依据开放移动联盟（Open Mobile Alliance，OMA）对数字版权管理（Digital Rights Management，DRM）的规范，提出了一种移动应用中数字版权管理的解决方案。该方案使用AES算法对数字内容加密有效地保护了版权，采用ACE的网络框架保证系统的并发性，消息传递和配置文件应用xml文件便于在现有系统上部署和使用。     

MPEG中的知识产权管理和保护标准IPMP

数字版权管理DRM（Digital Rights Management）是对于数字媒体内容（数字化的音频、视频、图像、文本等）在整个生命厨期（从内容提供、内容发布到内容消费）中的数字权利（创建、分发和使用）进行定义、解释、监督和管理的统一解决方案：应该认识到DRM不仅仅是阻止非授权用户访问和共享数字内容，而更重要的是允许授权用户能更便捷地访问更多高质量的数字内容．与此同时．为数字内容的创建、分发和使用提供更为灵活的商业模式。     

移动多媒体广播中的认证授权策略研究

针对移动多媒体广播大范围用户认证授权的需求特点,分析了移动多媒体广播中的认证授权特殊性,以及传统的条件接收、数字版权管理认证授权方案在移动多媒体广播中应用存在的问题.提出了移动多媒体广播中的认证授权策略,给出了其基本框架,研究了包括重叠网模型、条件接收与数字版权管理结合、双层条件接收等在内的解决方案.通过与传统的条件接收进行比对,提出的方法更适合移动多媒体广播的大用户量并发认证.     

移动流媒体数字版权管理

文章首先介绍了数字版权管理的基本原理,然后描述了DRM的三种内容分发方式,并讨论了专用于移动网络流媒体DRM的内容格式及相关的业务流程,最后对OMA DRM的发展趋势作了简要分析.     

基于数字版权管理平台的手机内容业务商业模式

本文从运营商的角度提出一种基于数字版权保护和管理技术的手机内容业务商业模式,打造手机数字内容的版权保护、版权管理、交易和监控平台。和传统宽带数字业务运营模式对比,该模式更有利于运营商在内容提供商、内容分发商以及用户之间建立桥梁推动业务分发价值链的发展,使其成为整个移动媒体业务价值链的核心。     

一种基于PKI和P2P模式的DRM系统

根据P2P网络的特点和DRM数字版权管理系统的要求，利用基于智能卡的公钥基础设施和P2P用户网络建立一种新的DRM数字版权管理系统，本文介绍系统各个部分的功能和系统工作流程，并就相关的系统安全性进行分析。该系统克服了传统C／S模式下DRM系统缺点，又解决了P2P内容分发模式的版权缺失问题。     

云计算环境中支持隐私保护的数字版权保护方案简

针对云计算环境中数字内容安全和用户隐私保护的需求,提出了一种云计算环境中支持隐私保护的数字版权保护方案。设计了云计算环境中数字内容版权全生命周期保护和用户隐私保护的框架,包括系统初始化、内容加密、许可授权和内容解密4个主要协议;采用基于属性基加密和加法同态加密算法的内容加密密钥保护和分发机制,保证内容加密密钥的安全性;允许用户匿名向云服务提供商订购内容和申请授权,保护用户的隐私,并且防止云服务提供商、授权服务器和密钥服务器等收集用户使用习惯等敏感信息。与现有的云计算环境中数字版权保护方案相比,该方案在保护内容安全和用户隐私的同时,支持灵活的访问控制,并且支持在线和超级分发应用模式,在云计算环境中具有较好的实用性。     

支持时空约束的可信数字版权管理安全许可协议

提出一种新的支持时空约束的数字版权管理安全许可协议(CPSec DRM),该协议将内容对象与版权对象相分离,通过内容加密密钥CEK保护数字内容本身,而通过与客户设备信息相关的设备密钥DEK保护每一份许可证.在用户与许可证中心之间采用动态实时密钥协商算法实现双向认证和动态许可申请,通过"时间、空间空约束相关联"、"终端、许可服务器相认证"、"许可证书实时动态生成与发布"机制实现许可证的可区分安全管理.考虑到离线版权安全许可,本协议中引入了许可证转换器的概念,通过许可倒计数机制实现为特定数量用户可按在线、离线模式进行版权二次分发.所提协议CPSec DRM支持在线、离线两种版权许可模式,用户在获得域许可证后,无需依赖原来的许可证中心即可完成版权的二次分发(包括在线和离线).分析表明所提协议在内容保护、安全认证、许可授权和应用模式等方面满足DRM内容保护要求和目标.     

数字版权管理

数字版权管理是在销售、分发和使用中保护数字媒体内容版权的机制,其英缩写为DRM(Digital Dight management)。随着信息技术的发展和广泛使用,出现了很多种数字版权管理的规范和实现技术,分别用于不同的领域。0MA(Open Mobile Alliance)作为开放的国际无线数据业务组织,其成员包括世界上主要的移动运营商、设备制造商以及信息技术提供商等。OMA     

面向移动增值业务的数字版权管理方案

数字版权管理技术可以使内容提供商有效地控制他们的数字媒体对象的发布。它可以限制用户的操作,用户的使用次数,规定用户使用的起止时间或者提供预览功能等等。从介绍DRM的基本原理及功能出发,阐述了DRM的架构及其核心技术,最后介绍了如何把它运用在移动增值业务上的实现步骤。     

Interoperable DRM Framework for Multiple Devices Environment

As networks increase and cross‐convergence occurs between various types of devices and communications, there is an increasing demand for interoperable service in the business environment and from end users. In this paper, we investigate interoperability issues in the digital rights management (DRM) and present a practical framework to support interoperability in environments with multiple devices. The proposed architecture enables end users to consume digital content on all their devices without awareness of the underlying DRM schemes or technologies. It also enables DRM service providers to achieve interoperability without costly modification of their DRM schemes.     

Digital rights management independent of terminals in mobile applications

At present, most mobile terminals do not have any functions of rights management, and the cryptology-based method cannot resolve all the copyright problems in the mobile digital distribution service. With the urgent demand of digital rights management in digital distribution service, a scheme independent of terminals is proposed in this article. It integrates the watermark and signature techniques. In this article the scheme theory, architecture, service process, and performance are mainly discussed. In the end, the functional relationship between the proposed digital rights management (DRM) and the cryptology-based open mobile alliance digital rights management (OMA-DRM) is given. The analysis shows that the scheme is feasible and secure.     

Advances in Digital Video Content Protection

The use of digital video offers immense opportunities for creators; however, the ability for anyone to make perfect copies and the ease by which those copies can be distributed also facilitate misuse, illegal copying and distribution ("piracy"), plagiarism, and misappropriation. Popular Internet software based on a peer-to-peer architecture has been used to share copyrighted movies, music, software, and other materials. Concerned about the consequences of illegal copying and distribution on a massive scale, content owners are interested in digital rights management (DRM) systems which can protect their rights and preserve the economic value of digital video. A DRM system protects and enforces the rights associated with the use of digital content. Unfortunately, the technical challenges for securing digital content are formidable and previous approaches have not succeeded. We overview the concepts and approaches for video DRM and describe methods for providing security, including the roles of encryption and video watermarking. Current efforts and issues are described in encryption, watermarking, and key management. Lastly, we identify challenges and directions for further investigation in video DRM.     

The Open Mobile Alliance Digital Rights Management [Standards in a Nutshell]

The Open Mobile Alliance (OMA) is an industry forum with nearly 400 members representing the entire mobile industry value chain, including the telecommunications, information technology, and content industries. The OMA focuses on developing market-driven, interoperable mobile service enablers for the rapidly converging communications, entertainment, and media worlds. OMA digital rights management (DRM) systems are important examples of such enablers. Although they have been developed for the mobile market, these systems assume network and bearer-agnostic delivery of the content over Internet protocol (IP). This assumption makes OMA DRM systems suitable for use in any environment where the content is delivered over IP, which is true of a very wide array of applications. In this article, we present an overview of the OMA DRM systems and describe their most important features     

OMA DRM技术体系研究综述

为了对最新发布的开放移动联盟(OMA)数字版权管理(DRM)标准的技术体系结构有一个系统全面的认识,积极推动我国DRM标准的制定和数字内容保护技术的应用研究,该文在深入研究最新发布的OMA DRM2. 0规范的基础上,对OMA DRM技术体系结构:版权对象获取协议(ROAP)、安全模式、体系结构、内容格式和版权描述语言进行了详细分析,然后从综合角度给出一个系统全面的OMA DRM工作机制:OMA DRM 工作流程和原理,最后,对OMA DRM性能做了详细分析:OMA DRM2. 0和OMA DRM1. 0的主要区别,以及OMA DRM2. 0的尚待改进之处。     

A Tool Pack Mechanism for DRM Interoperability

As the number of digital content service providers increases, a variety of digital rights management (DRM) systems appear without supporting interoperability. The lack of interoperability in DRM systems causes inconvenience to customers, especially when they want to play content through multiple devices manufactured by different vendors. In this letter, we propose a novel method to support interoperability between different DRM systems. The proposed technique aims to build an open framework structure which satisfies DRM vendors' requirements by enhancing the security of intellectual property management and the protection tools.     

Authentication gets personal with biometrics

Securing the exchange of intellectual property and providing protection to multimedia contents in distribution systems have enabled the advent of digital rights management (DRM) systems. User authentication, a key component of any DRM system, ensures that only those with specific rights are able to access the digital information. It is here that biometrics play an essential role. It reinforces security at all stages where customer authentication is needed. Biometric recognition, as a means of personal authentication, is an emerging signal processing area focused on increasing security and convenience of use in applications where users need to be securely identified. In this article, we outline the state-of-the-art of several popular biometric modalities and technologies and provide specific applications where biometric recognition may be beneficially incorporated. In addition, the article also discussed integration strategies of biometric authentication technologies into DRM systems that satisfy the needs and requirements of consumers, content providers, and payment brokers, securing delivery channels and contents.