数字内容合理共享机制研究

发布时间：2018-04-29 22:23

本文选题：数字版权管理 + 合理共享　；参考：《西安电子科技大学》2013年博士论文

【摘要】：随着数字技术和通信网络的日益发达，通过智能终端和网络传播和使用数字内容变得越来越容易。由于数字内容具有易于无损复制、传播等特性，因此，如果缺乏对数字内容的版权管理和保护，将会滋生大量的盗版和数字内容的不规范使用，从而对数字内容产业造成重大的冲击，并最终影响社会的经济和文化发展。在此背景下，数字版权管理(Digital Rights Management，简称DRM)技术应运而生。数字版权管理技术是对各种数字内容的知识产权进行保护的一系列软硬件技术的总称，用以保证数字内容在整个生命周期内的合法使用，包括对数字内容各种形式的使用进行描述、识别、交易、保护、监控和跟踪等各个过程。提出DRM系统的初衷是为了维护数字内容提供商的利益、防止数字内容的非法传播，因此传统的数字版权管理系统都采用的严格技术保护措施，以限制数字内容的共享。但是，这种数字版权管理系统会对用户利益造成损害，例如造成用户的使用不便和隐私泄露等，从而降低了用户对数字版权管理系统的满意度，并最终阻碍了数字版权管理系统的发展。于是，为提高用户对数字版权管理系统的可接受性、解决内容提供商与用户之间的利益冲突，以“双赢”为目标的数字内容合理共享机制逐渐成为研究的热点。本文从研究数字内容合理共享的实施策略和方法的角度，在对DRM价值链利益关系分析的基础上，提出了一种合理共享的实施策略，以及一系列可实施此策略的模型。论文的主要研究成果有： 1.提出一种DRM博弈控制模型以及数字内容合理共享策略。博弈的控制者依据全局优化目标来选择策略，迫使被控者依据自身利益最大化原则选择控制者期望的策略，从而实现全局的优化控制。在此基础上，建立DRM博弈控制模型，模型中内容提供商作为控制者，而用户作为模型的被控制者。通过分析共享策略对内容提供商和用户的收益影响，提出了一种合理共享的实施策略。 2.提出一种基于代理重加密的数字内容共享模型。该模型将数字内容的共享过程设计为一个代理重加密过程。从而使得在不建立授权域的情况下，任意合法设备间可以灵活的共享数字内容，同时，内容提供商可以动态掌控共享数字内容的设备数目。 3.提出一种离线数字内容共享模型。该模型使用一种只能运行指定次数的安全程序生成共享所需的必要数据，从而使得内容提供商在出售数字内容时，可设定能够共享数字内容的设备最大数目，并且共享过程中，，用户不需要和内容提供商进行交互。离线共享模型可以减少用户对网络和内容提供商的依赖，保护用户隐私，提高用户收益。 4.提出一种基于属性基加密的多层次数字内容共享模型。借助该模型，内容提供商可控制数字内容只被授权域内指定的设备共享，从而可以灵活掌控授权域内共享特定数字内容的设备数目。为了便于管理，根据个性化共享需求，用户可以在授权域内建立逻辑上的“子授权域”，并且每个子域都与属性相对应。用户购买数字内容时，内容提供商使用数字内容的域属性来加密许可证。使得只有购买数字内容的子域，才可以访问此数字内容。
[Abstract]:With the increasing development of digital technology and communication network, it is becoming more and more easy to spread and use digital content through intelligent terminals and networks. As digital content is easy to copy, spread and so on, the lack of copyright management and protection of digital content will breed a large number of piracy and digital content. It has a great impact on the digital content industry and ultimately affects the economic and cultural development of the society. In this context, Digital Rights Management (DRM) technology has emerged. Digital rights management technology is a series of software and hardware technologies to protect the intellectual property of various digital content. The general term is used to ensure the legitimate use of digital content throughout the life cycle, including the description, identification, transaction, protection, monitoring and tracking of the use of various forms of digital content.
The original intention of the DRM system is to maintain the interests of digital content providers and prevent the illegal dissemination of digital content. Therefore, the traditional digital rights management systems adopt strict technical protection measures to restrict the sharing of digital content. However, this digital copyright management system will cause damage to the user's interests, such as the users. The user's satisfaction to digital rights management systems is reduced and the development of the digital rights management system is eventually hindered by the inconvenience of inconveniences and privacy leaks, and thus, to improve the acceptability of the user to the digital rights management system and to solve the conflict of interests between the content providers and the users, the number of "win-win" as the target is the number of users. The rational sharing mechanism has gradually become a research hotspot.
On the basis of the analysis of the interest relationship of DRM value chain, this paper puts forward a reasonable sharing strategy and a series of models to implement this strategy on the basis of the study of the implementation strategies and methods of the rational sharing of digital content.
1. a DRM game control model and a rational sharing strategy for digital content are proposed. The controller of the game chooses the strategy according to the global optimization goal, forcing the controller to choose the controller's expectation according to the principle of maximization of its own interests, thus realizing the global optimization control. On this basis, the DRM game control model is established and the model is in the middle of the model. The volume provider is the controller, and the user is the control of the model. By analyzing the impact of the sharing strategy on the income of the content providers and the users, a reasonable sharing strategy is proposed.
2. a digital content sharing model based on proxy re encryption is proposed. This model designs the sharing process of digital content into a proxy re encryption process, which allows the flexible sharing of digital content between any legitimate devices without the establishment of authorized domain, and the content provider can dynamically control the content of the shared digital content. The number of equipment.
3. an offline digital content sharing model is proposed. This model uses a secure program that can only run a specified number of times to generate the necessary data for sharing, so that the content provider can set the maximum number of devices that can share digital content when selling digital content, and in the process of sharing, the user does not need to provide the content with the content. Business interaction. Offline sharing model can reduce users' dependence on network and content providers, protect user privacy and improve user returns.
4. a multilevel digital content sharing model based on attribute based encryption is proposed. By using this model, content providers can control digital content only shared by authorized devices in the authorized domain, so that the number of devices that share specific digital content within the authorized domain can be controlled flexibly. A logical "subdomain" is established within the authorized domain, and each subdomain corresponds to the attribute. When a user buys a digital content, the content provider encrypts the license using the domain property of the digital content so that only the subdomain purchase of the digital content can be accessed.

【学位授予单位】：西安电子科技大学
【学位级别】：博士
【学位授予年份】：2013
【分类号】：TP309.7

【相似文献】