移动医疗中隐藏访问结构的云外包属性基加密

发布时间：2018-01-15 18:29

本文关键词：移动医疗中隐藏访问结构的云外包属性基加密　出处：《西安电子科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：近些年智能手机的普及为可穿戴设备的发展提供了支撑,谷歌眼镜、智能手环、智能手表等等智能可穿戴设备正飞速的走进我们的视野。这些可穿戴设备的广泛应用正逐步改变传统的医疗方式。可穿戴设备为人们带来了更健康的生活方式,同时也为医护人员对于病症的根源提供更多的健康数据。但是其隐私安全却成为一个回避不了的问题。医学数据(譬如指纹,虹膜,DNA等)的泄露通常比个人基本信息的泄露具有更大的隐患。而且在移动医疗过程中需要使用该医疗数据的往往是具有特定属性特征的人群(例如某一类专家),所以在可穿戴医疗设备上数据的加密适合采取基于属性的加密技术。但在实际应用中经常为了达到细粒度的访问控制,密文的访问控制策略一般也会随之变得更加复杂,导致其对应的解密开销也会随之急速增加,而用户设备(智能手机,笔记本电脑等)并不一定能够承受如此耗时的计算等待。针对这个问题,我们可以将该解密过程外包给云计算。但是现有的云外包方案对于使用者属性的保护不足。也就是说我们可以通过存储在云端的访问结构知道哪些人可以访问该数据,以及访问者的属性信息。所以我们针对移动医疗中的这种情况在前人研究的基础上提出了全新的隐藏访问结构的基于属性加密的云外包。本文的主要内容如下：1、分析了可穿戴设备的研究背景和发展现状,并对其发展前景进行了一定的展望,随后将其中关于隐私保护方面主要存在的一些问题进行了重点的分析和讨论,引出我们的解决方案。2、介绍基于身份加密的研究背景和现状。而基于属性加密则是基于身份加密的进一步发展,其将唯一性标识用模糊化的属性集合标示,这些属性集合由一个或多个属性组成。接着介绍了基于属性加密的相关技术理论和研究背景。3、本文针对移动医疗数据属性的敏感性提出了一个密文策略的隐藏访问结构的基于属性加密的云外包方案。该方案在素数群中提出了一个具有隐藏访问结构功能的基于属性加密技术,然后再将其外包给云服务器,充分的保障了用户数据以及用户身份本身的安全。最后我们通过形式化证明,证明了该方案的正确性,并对方案进行了安全性证明,以及计算开销和通信开销作出相应分析并与其他的基于属性加密方案进行了对比。最终,我们证明了本方案的可行性,并对移动医疗未来的发展前景给出了相关分析。
[Abstract]:In recent years, the popularity of smartphones has provided support for the development of wearable devices, Google Glass, smart bracelet. Smart wearable devices, such as smart watches, are rapidly coming into our view. The wide application of these wearables is gradually changing the traditional medical methods. Wearable devices have brought people a healthier way of life. It also provides more health data for health care workers on the root causes of the disease. But their privacy is an unavoidable issue. Medical data (such as fingerprints, iris). (DNA et al.) leaks are usually more dangerous than the disclosure of basic personal information. And it is often the population with specific attributes that needs to use the medical data in the mobile medical process (. For example, a particular category of experts. Therefore, the encryption of data on wearable medical devices is suitable for the use of attribute-based encryption technology, but in practical applications, it is often used to achieve fine-grained access control. The access control strategy of ciphertext will become more complex, resulting in the corresponding decryption costs will increase rapidly, and user devices (smart phones). Notebook computers, etc.) are not necessarily able to withstand such time-consuming computational wait. To address this problem. We can outsource the decryption process to cloud computing, but the existing cloud outsourcing scheme does not protect consumer properties. That is to say, we can know who can access it by using the access structure stored in the cloud. Data. Therefore, we propose a new hidden access structure based on attribute encryption cloud outsourcing. The main contents of this paper are as follows:. 1. This paper analyzes the research background and development status of wearable devices, and gives a certain prospect of its development, and then analyzes and discusses the main problems in privacy protection. This paper introduces our solution. 2, introduces the background and current situation of ID-based encryption, while attribute-based encryption is the further development of ID-based encryption, which marks unique identity with fuzzy attribute set. These attribute sets are composed of one or more attributes. Then, the related technology theory and research background based on attribute encryption are introduced. 3. In this paper, we propose a hidden access structure based on attribute encryption for the sensitivity of mobile medical data attributes. In this scheme, we propose a hidden access structure with the function of hidden access structure in prime group. Attribute based encryption technology. Then it is outsourced to the cloud server, which fully guarantees the security of user data and user identity. Finally, we prove the correctness of the scheme through formal proof. The security proof of the scheme and the corresponding analysis of computational overhead and communication overhead are given and compared with other attribute-based encryption schemes. Finally, we prove the feasibility of this scheme. The future development of mobile medicine is analyzed.
【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】：TN918.4

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