面向信息交换的隐私保护机制研究

Randomly share and access across different systems has become the main body of the information exchange in pervasive networks with multiple characteristics, such as openness, heterogeneity, mobility, dynamic, multiple security domains, etc., promote the information dissemination into a new state, accessing information in “system of system” via “network of network”. However, this mode brings more privacy concerns including risks of privacy information leakage, hardness on the dynamic privacy-preserving control, etc. Therefore, we thoroughly analyze the modes of the information dissemination and user scenarios changing in the multi-source heterogeneous network environment, we emphasize two scientific problems: multi-source information privacy awareness and dynamic measurement, flexible access control mechanism. Our aim is to make breakthroughs on the privacy awareness in the multi-source environment, scenario-aware privacy dynamic measurement, scenario defined privacy protection scheme, novel access control technology and security model, privacy splitting and authorization extension to achieve the adaptive reconstructed privacy algorithm, provide fine-grained privacy protection when information exchange happens across different systems and extended authorization after exchanging. Our results will enrich the connotation of the privacy protection in the process of information exchange across different systems, and provide a trustworthy and controllable mechanism for the privacy information exchange.

跨系统随机共享访问已成为具有开放性、异构性、移动性、动态性、多安全域等诸多特性的泛在网络中信息交换的主体，推动形成了通过“网络之网络”访问“系统之系统”的信息传播方式。然而，跨系统信息交换面临着隐私信息泄漏风险点多、动态隐私保护可控难等问题。为此，全面分析并抽象多源异构网络环境中信息传播和用户场景变迁模式，重点研究多源信息的隐私感知和动态度量、柔性访问控制机制两个科学问题，突破多源环境信息的隐私感知、场景适应的隐私动态度量、场景定义的隐私保护方案、新型访问控制技术与安全模型、隐私分割与延伸授权等关键技术，实现对隐私算法的自适应重构，对隐私信息跨系统交换时的细粒度保护和交换后的延伸授权。项目研究成果将丰富跨系统信息交换过程中隐私保护的内涵，为隐私信息交换提供一个可信可控机制。

本项目针对跨系统信息交换过程中存在的隐私信息泄漏风险点多、动态隐私保护可控难等问题，全面分析并抽象多源异构网络环境中信息传播和用户场景变迁模式，紧紧围绕多源信息的隐私感知与动态度量、柔性访问控制机制两个科学问题，聚焦多源环境信息的隐私感知、场景适应的隐私动态度量、场景定义的隐私保护方案、新型访问控制技术与安全模型、隐私分割与延伸授权等方面研究内容，重点突破时空变化的隐私信息细粒度感知、基于博弈的隐私建模与度量、隐私保护算法的模块化拆分重构、访问模式与策略自适应的安全访问、跨社交网络的隐私图片延伸控制等关键技术，全面实现对隐私算法的自适应重构、对隐私信息跨系统交换时的细粒度保护和交换后的延伸授权。项目组执行期间发表和录用了34篇论文，其中大部分发表在国内外重要学术期刊或会议上，被SCI检索或待检索论文8篇、EI检索论文32篇，同时申请专利4项，获中国通信学会科学技术（技术发明奖）一等奖1项。