Скачать или смотреть Light weight secure data sharing schema for mobile cloud computing

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Abstract—With the popularity of cloud computing, mobile devices can store/retrieve personal data from anywhere at any time. Consequently, the data security problem in the mobile cloud becomes more and more severe and prevents further development of the mobile cloud. There are substantial studies that have been conducted to improve cloud security. However, most of them are not applicable to the mobile cloud since mobile devices only have limited computing resources and power. Solutions with low computational overhead are in great need of mobile cloud applications. In this paper, we propose a lightweight data sharing scheme (LDSS) for mobile cloud computing. It adopts CP-ABE, an access control technology used in a normal cloud environment, but changes the structure of the access control tree to make it suitable for mobile cloud environments. LDSS moves a large portion of the computational intensive access control tree transformation in CP-ABE from mobile devices to external proxy servers. Furthermore, to reduce the user revocation cost, it introduces attribute description fields to implement lazy-revocation, which is a thorny issue in program based CP-ABE systems. The experimental results show that LDSS can effectively reduce the overhead on the mobile device side when users are sharing data in mobile cloud environments.
Index Terms—mobile cloud computing, data encryption, access control, user revocation
1 INTRODUCTION ith the development of cloud computing and the popularity of smart mobile devices, people are gradually getting accustomed to a new era of data sharing model in which the data is stored in the cloud and the mobile devices are used to store/retrieve the data from the cloud. Typically, mobile devices only have limited storage space and computing power. On the contrary, the cloud has an enormous amount of resources. In such a scenario, to achieve satisfactory performance, it is essential to use the resources provided by the cloud service provider (CSP) to store and share the data. Nowadays, various cloud mobile applications have been widely used. In these applications, people (data owners) can upload their photos, videos, documents and other files to the cloud and share these data with other people (data users) they like to share. CSPs also provide data management functionality for data owners. Since personal data files are sensitive, data owners are allowed to choose whether to make their data files public or can only be shared with specific data users. Clearly, data privacy of personal sensitive data is a big concern for many data owners.