基于Web的社交物聯(lián)網(wǎng)體系架構(gòu)、模型及其安全與隱私關(guān)鍵技術(shù)研究
[Abstract]:Internet of Things (IoT) connects all kinds of sensors, controllers and embedded devices in the physical world to the Internet through wired and wireless access. It expands the boundary and ability of information system to obtain the information of the physical world. On the basis of the traditional information network with human semantics as the core, the object contribution data is introduced. Compared with the Internet, the Internet of Things has the following characteristics: (1) the Internet of Things has deployed a large number of heterogeneous sensors, each sensor is an information source, different types of sensors obtain different information content and information format; (2) Things. The environmental data collected by Internet terminals are real-time; (3) User experience-centered application innovation is the driving force for the development of the Internet of Things.
The current industry-based Internet of Things (IOT) systems adopt a tightly coupled closed architecture, which makes the systems present a silo-like information island. Although this architecture is suitable for large-scale industrial applications with a clear demand, it is difficult to open and share data and service capabilities because of the system infrastructure, and third-party resources. It is difficult to be integrated into the system at low cost, which makes it difficult to apply and popularize the Internet of Things on a large scale. In addition, the problems of fragmentation of market, small scale of application, high threshold of development, long development cycle and low participation of users in the field of Internet of Things constitute the bottleneck of the development of the Internet of Things. It is the inevitable direction of the development of the Internet of Things technology to realize the convenient sharing of information data and control functions of the Internet of Things terminals, to integrate the end nodes of the perceptual network into the information space, and to realize the ubiquitous computing business environment with the open and universal service capability.
In view of the above problems, this paper summarizes the future development of the Internet of Things as two major trends of openness and socialization, and proposes a Web-based Social Web of Things (SWoT) architecture. Heterogeneous devices, capabilities abstracted into a unified resource model, using URI (Uniform Resource Identifier) to unify fine-grained resource identification, to shield the underlying heterogeneity, to achieve unified collaborative processing and scheduling of resources; based on SWOT service platform and service gateway, a REST API is designed to build a more open network and information collaboration. From a social point of view, the core idea of SWoT is: on the one hand, it supports the socialized intelligent interaction between people and things, and between things, so that users can share personal devices and perceived data; on the other hand, it will Entities and their physical and logical relationships in the Internet of Things are abstracted as points and edges in social networks. Complex social models can connect "point-like" resources into a network through multi-dimensional social relations, creating more space for resource sharing, trust evaluation, access control and other services. Home system realizes the unified identification of resources, openness, and intelligent interaction of nodes. At the same time, based on Sina Weibo social platform, the application of Internet of Things resource discovery is developed, and the performance analysis is carried out.
However, the data collected by the Internet of Things (IOT) through cameras, sensors and so on are closely related to people's daily life, and their perceptions are highly related. This huge system will become a huge peer-to-peer system if it is not added to the security and privacy standards. Especially in the SWoT IOT business environment, communication, data collaboration and other operations. More frequently, third-party applications will acquire data through open interfaces for data mining, and will be more aware of our behavior and preferences than we do, which will pose a threat to sensitive data and privacy information; as perceived data may be stored on heterogeneous distributed business gateways and stored, managed, and opened, it will also create storage Storage and search security issues. As the Internet of Things becomes more socialized, users will share more personal devices and perceived data. Various SWOT node attributes, complex social relationships, and user-generated content (UGC) in social processes will be able to uniquely locate a single node, thus providing security for traditional data sets. Privacy technology is difficult to directly apply, and it is more difficult to predict the privacy leakage of users, and it is also more difficult to protect privacy.
Aiming at the security and privacy problems brought about by the socialization of the Internet of Things, this paper proposes a privacy measurement algorithm for anonymous publishing of data based on attacker's background knowledge. Firstly, we analyze the possible attacker's background knowledge in SWoT, and design a hidden algorithm based on multivariate kernel regression model for the correlation of node attributes and the background knowledge of connection relationship. Private measurement algorithm, this algorithm fully considers the data distribution of each attribute and proposes the concept of local kernel bandwidth, and introduces covariance matrix to improve the original hypothesis attribute independent kernel regression algorithm. Considering the high dimensionality of content vectors generated by UGC through TF-IDF, we use PCA dimensionality reduction technology to further improve the algorithm. By simulating the real data of Sina Weibo with MATLAB, we verify that the algorithm can effectively measure the above three. Privacy breaches brought about by background knowledge of attackers.
In order to solve the security and privacy problems of storage and search caused by the open mode of service gateway in SWoT, a security enhanced search algorithm based on node trust and P2P Chord virtual security domain is proposed. A trust evaluation algorithm based on the integration of Underlay and Overlay is designed. The virtual security domain based on Chord is constructed, and the inter-domain routing table, intra-domain routing table and evaluation list are defined. The maintenance of virtual security domain is discussed to solve the problem of resource storage and security search in the open mode of SWoT service gateway. The security enhancement search algorithm based on P2P virtual security domain is discussed. A two-tier access control mechanism for security domain and node is designed, and an optimal node selection strategy is proposed.
【學(xué)位授予單位】:北京郵電大學(xué)
【學(xué)位級(jí)別】:博士
【學(xué)位授予年份】:2014
【分類號(hào)】:TP391.44;TN929.5
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