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Scalable and Secure Sharing of Personal Health Records in Cloud Computing using Attribute-based Encryption

Platform : DOT NET

IEEE Projects Years : 2012 - 13

Scalable and Secure Sharing of Personal Health
Records in Cloud Computing using
Attribute-based Encryption

Abstract—Personal health record (PHR) is an emerging patient-centric model of health information exchange, which is often
outsourced to be stored at a third party, such as cloud providers. However, there have been wide privacy concerns as personal health
information could be exposed to those third party servers and to unauthorized parties. To assure the patients’ control over access
to their own PHRs, it is a promising method to encrypt the PHRs before outsourcing. Yet, issues such as risks of privacy exposure,
scalability in key management, flexible access and efficient user revocation, have remained the most important challenges toward
achieving fine-grained, cryptographically enforced data access control. In this paper, we propose a novel patient-centric framework
and a suite of mechanisms for data access control to PHRs stored in semi-trusted servers. To achieve fine-grained and scalable data
access control for PHRs, we leverage attribute based encryption (ABE) techniques to encrypt each patient’s PHR file. Different from
previous works in secure data outsourcing, we focus on the multiple data owner scenario, and divide the users in the PHR system into
multiple security domains that greatly reduces the key management complexity for owners and users. A high degree of patient privacy
is guaranteed simultaneously by exploiting multi-authority ABE. Our scheme also enables dynamic modification of access policies or
file attributes, supports efficient on-demand user/attribute revocation and break-glass access under emergency scenarios. Extensive
analytical and experimental results are presented which show the security, scalability and efficiency of our proposed scheme


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