隐私保护的智能交通流量分析方案研究与实现

发布时间：2018-04-16 08:09

本文选题：智能交通系统 + 交通流量分析　；参考：《西安电子科技大学》2015年硕士论文

【摘要】：随着互联网技术和社会经济的飞速发展,人们生活水平也在飞速提升,每户平均拥有的机动车数量也在逐年剧增,且人们对交通的需求量也没有递减的趋势。这在便利了人们日常生活、促进国家经济发展的同时,也给城市道路交通带来了巨大的压力。为缓解这种状况,智能交通系统(Intelligent Transportation System,简称ITS)迅速发展起来,近年来引起了学术界和工业界的研究热潮。而随着ITS的普及以及发展,车载信息系统(Vehicle Information System,简称VIS)以及车载自组网(Vehicular ad hoc network,简称VANET)等新兴的智能交通技术也随之发展起来。智能交通系统可以很大程度地改善道路交通状况,减少交通事故的发生。但是ITS的繁荣还是面临着很多问题,比如说单个用户数据的隐私保护问题以及位置隐私保护问题。现有的一些方案虽然也在一定程度上解决了隐私保护问题,但是还存在精度不高、代理转发安全性差等缺点。本文根据智能交通系统面临的挑战,分析现有方案特点,利用基于Pailliar同态加密技术的聚合技术,重点对智能交通系统中单个用户的数据隐私及身份隐私进行了研究。具体工作内容如下:第一,本文通过分析现有方案,将道路信息映射到了一个超级递增序列,实现了多维数据向一维数据的聚合,这样一来降低了中间节点的负荷,提高了整个智能交通系统的传输和处理效率。同时,超级递增序列的使用,使得交通管理中心可以明确区分每个路段信息,实现了交通流量数据细粒度的采集与分析。第二,利用聚合技术、Paillier同态加密技术、BLS短签名技术,实现了在不泄露用户隐私的前提下,计算分析出每个路段的平均车速和用户个数的目标,且可以高效精确地区分出不同的路段。我们能够在保护用户隐私的同时分析不同路段的交通流量,给人们的出行制定更好的交通计划带来便利,实现了高精度的用户数据隐私保护。第三,避免了身份隐私泄露给中间节点的风险。每个合法的用户实时采集速度信息,然后在车载终端加密签名处理后发送给他(她)所在区域的道路单元设备。道路单元设备收到数据后并不能解密密文,而是直接初步聚合签名处理后发送给交通管理中心。因此,在整个过程中,用户的身份隐私是不会被泄露给道路单元设备的。且每个用户的单个数据信息是安全的,实现了单个用户数据的隐私保护。
[Abstract]:With the rapid development of Internet technology and social economy, people's living standard is also rising rapidly, the average number of motor vehicles per household is also increasing sharply year by year, and the demand for transportation is not decreasing.This not only facilitates people's daily life and promotes national economic development, but also brings great pressure to urban road traffic.In order to alleviate this situation, Intelligent Transportation system (ITSs) of Intelligent Transportation system (its) has developed rapidly, which has aroused the research upsurge in academia and industry in recent years.With the popularization and development of ITS, the new intelligent transportation technologies, such as vehicle Information system (vis) and vehicle hoc Network (VANET), have been developed.Intelligent Transportation system (its) can greatly improve road traffic conditions and reduce traffic accidents.However, the prosperity of ITS still faces many problems, such as the privacy protection of individual user data and location privacy.Although some existing schemes have solved the problem of privacy protection to some extent, there are still some shortcomings such as low precision and poor security of forwarding agent.According to the challenge of Intelligent Transportation system (its) and the characteristics of existing schemes, this paper focuses on the data privacy and identity privacy of individual users in its by using the aggregation technology based on Pailliar homomorphic encryption technology.The specific work is as follows: first, by analyzing the existing schemes, this paper maps the road information to a super incremental sequence, realizes the aggregation of multidimensional data to one-dimensional data, which reduces the load of intermediate nodes.The transmission and processing efficiency of the whole intelligent transportation system is improved.At the same time, with the use of super increasing sequence, traffic management center can clearly distinguish the information of each section and realize the fine grained collection and analysis of traffic flow data.Secondly, the Paillier homomorphic encryption technique and BLS short signature technique are used to realize the goal of calculating and analyzing the average speed and the number of users in each section without revealing the user's privacy.And can effectively and accurately distinguish different sections of the road.We can protect the privacy of users and analyze the traffic flow of different sections of the road at the same time, which makes it convenient for people to make better transportation plans, and realizes the protection of user data privacy with high precision.Third, the risk of identity privacy leaking to the middle node is avoided.Each legitimate user collects speed information in real time and sends it to the road unit device in his or her area after encryption and signature processing at the vehicle terminal.After receiving the data, the road unit equipment can not decrypt the ciphertext, but send it to the traffic management center after the initial aggregation signature processing.Therefore, in the whole process, the user's identity privacy will not be leaked to the road unit device.And the individual data information of each user is secure, which realizes the privacy protection of the single user data.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U495

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