Advertisement
Published in:
2019 | OriginalPaper | Chapter
Using Blockchain to Control Access to Cloud Data
Authors : Jiale Guo, Wenzhuo Yang, Kwok-Yan Lam, Xun Yi
Published in: Information Security and Cryptology
Publisher: Springer International Publishing
Abstract
As cloud storage becomes more common, data security is an increasing concern. In this paper, we propose a new approach to control access to the user’s data stored in the cloud with the state-of-the-arts decentralized blockchain technology. In general, an access control solution for cloud data involves three components: authentication, authorization and auditing. It is expensive for the cloud server to ensure authentication, authorization and auditing for access control of the user’s data in cloud computing environment. In addition, it is hard to prevent the malicious cloud server from access to the user’s data and disclose the user’s privacy. Our approach distributes the access control tasks for authentication, authorization and auditing to a network of nodes like bitcoin. In particular, we keep the auditing records in the transparent blockchain. In addition, we employ the Shamir secret sharing scheme to manage the encryption key for cloud users.