数字权益管理中基于安全策略博弈控制的多方信任研究

项目名称： 数字权益管理中基于安全策略博弈控制的多方信任研究

项目编号： No.60803150

项目类型： 青年科学基金项目

立项/批准年度： 2009

项目学科： 轻工业、手工业

项目作者： 裴庆祺

作者单位： 西安电子科技大学

项目金额： 21万元

中文摘要： 本项目在数字权益管理（Digital Rights Management，简称DRM）支持的数字内容价值链中，通过在DRM安全性与价值链中实体多方效用之间寻找折中，保证安全策略的合理选取与部署，实现价值链中各方之间最优的安全-效用平衡，进而可有效地建立多方信任体系，在保障各方基本权利的同时，获得更大的收益。本项目提出了一个系统、完整的形式化分析框架，用于表述DRM安全组件/服务及其所组合策略的效用；提出了一个包括内容提供商、数字权利/服务提供商、以及用户三方之间的非合作博弈模型，并得出了纳什均衡及其存在条件；提出了一个由提供商和分享者两方参与的动态混合博弈模型；建立了DRM信任博弈模型，为合理解决内容提供商和用户之间的利益均衡提供了理论支撑；提出了一个基于代理重加密的DRM分享模型，并研究了相关实现技术。基于本项目资助，课题组在国内外会议和期刊上发表了学术论文27篇，并获得省部级奖励3项、专利授权5项、颁布标准3项。本项目为数字内容价值链中的多方信任关系的建立奠定理论基础，对建立DRM价值链多方信任的商业模型具有重要的应用价值。

中文关键词： 数字权益管理；多方信任；安全策略；博弈论分析；纳什均衡

英文摘要： This project achieved a best security-utility balance by the compromise of DRM security and utility among various participants in digital contents value chain supported by DRM (Digital Rights Management) and the choosen and deploy of proper security policy. Then the project established multi-party trust architecture effectively which could realize fundamental rights as well as acquire much more profits. The project proposed a systematical formal analysis frame to express the utility of DRM security components/service and the combined strategies of them. Then the project raised a non-cooperative game model which comprises the content provider, the digital right/service provider and the customers. In addition, the project drew the Nash equilibrium and its existence conditions. The project also proposed a dynamic hybrid game model containing the content provider, and the customers and a DRM trust game model which provides theoretical support for the proper balance between the content provider and the customers. Finally, the project proposed a DRM share model based on Proxy re-encryption, and further research on its implementation techniques were studied. With the financial aid of the project, our research group published twenty-seven papers in the domestic and international journals and conferences, and achieved three awards at the provincial and ministerial level. Our research also obtained five patents and issued three standards. This project is helpful to establish theoretical foundation of multi-party trust in digital contents value chain, also has key application value for DRM business model related to multi-party trust.

英文关键词： Digital Rights Management;Multi-Party Trust;Security Policy;Game-Theoretical Analysis;Nash Equilibrium