Secure architecture to manage EHR’s in cloud using SSE and ABE

Cloud computing turns up as an advanced computing model in all business domains. It is a novel interactive data model to realize industries and users who store data in cloud servers. The healthcare sector is one of the major industries for working with the enormous amount of data. With the advent of cloud computing, many healthcare organizations are motivated towards outsourcing their medical records, which are called Electronic Health Records (EHR’s) from local sites to the cloud environment. Outsourcing this sensitive data (i.e. EHR’s) helps organizations to provide cost-effective personalized services to patients. However, securing outsourcing data is a problematic issue. This paper proposes a Searchable Symmetric Encryption (SSE) and Attribute-Based Encryption (ABE) secure architecture to build privacy in the health care systems using the private cloud. Our system provides efficient key management using a pseudorandom number generator to avoid unauthorized access and preserving privacy in EHR’s storage. With the help of modified SSE, we can hide both keyword and access pattern, and improve search efficiency. The system provides EHR’s access in the emergency (when data owner does not meet the requirements) with the help of the ABE. Role-based login is another technique that is provided to monitor EHR’s activities to prevent misbehavior. Through the analysis of the proposed architecture, the privacy and efficiency in the cloud data is guaranteed.