Secure and Efficient Sensitive Info-Hiding for Data Sharing via DACES Method in Cloud

Abstract

Cloud computing has been developed very quickly within the past few years. With public cloud storage services, users can store remotely to servers in cloud and also recognize the sharing of data with other users. The public cloud servers cannot be completely trusted by users and cannot manage records kept on cloud like local storage devices. However, within cloud storage systems, stored data would possibly contain sensitive info which should not be visible to other users while sharing record in cloud. This becomes a challenge to realize secure and efficient information sharing within cloud. However, existing cryptographic mechanisms do not protect shared sensitive data which are typically protected using a low-entropy password. To tackle this, Division and Auditing of information in Cloud for Efficiency and Security (DACES) is recommended in order to treat the above issues for public cloud storage. In DACES: (i) Erasure code is applied to divide a single record into blocks and distributed them to different cloud servers. (ii) Privacy of data owner and data sharing with sensitive info-hiding is achieved by secure data integrity auditing scheme. (iii) Identity-based access management is implemented to recognize that only authorized users will access the sensitive information. Furthermore, the proposed method is secure and efficient for information sharing in cloud environment. At last, its application is in electronic health (E-health) record.