Abstract
Cloud computing and social networks are changing the way of healthcare by providing real-time data sharing in a cost-effective manner. However, data security issue is one of the main obstacles to the wide application of mobile healthcare social networks (MHSNs), since health information is considered to be highly sensitive. In this paper, we introduce a secure data sharing and profile matching scheme for the MHSN in cloud computing. The patients can outsource their encrypted health records to cloud storage with an identity-based broadcast encryption technique, and share them with a group of doctors in a secure and efficient manner. We then present an attribute-based conditional data re-encryption construction which permits the doctors who satisfy the pre-defined conditions in the ciphertext to authorize the cloud platform to convert a ciphertext into a new ciphertext of an identity-based encryption scheme for specialist without leaking any sensitive information. Furthermore, we provide a profile matching mechanism in the MHSN based on identity-based encryption with an equality test, which helps patients to find friends in a privacy-preserving way and achieves flexible authorization on the encrypted health records with resisting the keywords guessing attack. Moreover, this mechanism reduces the computation cost on the patient side. The security analysis and experimental evaluation show that our scheme is practical for protecting the data security and privacy in the MHSN.
Highlights
Mobile healthcare is an innovative combination of mobile devices and mobile communication technologies, for it can provide necessary health information, routine care improvements, potential infectious disease prevention, health interventions, etc
Let us consider a mobile healthcare social networks (MHSNs) system with identity-based encryption (IBE) in cloud computing, Alice may encrypt healthcare information using doctor Bob’s identity and outsource the ciphertext to the cloud service provider (CSP), while Bob can obtain his secret key from the trusted authority (TA) and access Alice’s health data
(1) We propose a secure identity-based data sharing scheme for MHSN, which allows patients to outsource their encrypted health records to CSP with identity-based broadcast encryption (IBBE) technique, VOLUME 6, 2018 and share them with a group of doctors in a secure and efficient manner
Summary
Mobile healthcare is an innovative combination of mobile devices and mobile communication technologies, for it can provide necessary health information, routine care improvements, potential infectious disease prevention, health interventions, etc. Let us consider a MHSN system with IBE in cloud computing, Alice may encrypt healthcare information using doctor Bob’s identity and outsource the ciphertext to the CSP, while Bob can obtain his secret key from the trusted authority (TA) and access Alice’s health data. In this way, IBE can achieve simple but efficient access control over the sensitive health data. SYSTEM MODEL Our proposed secure identity-based data sharing and profile matching model for MHSN in cloud computing is shown, including five entities: central authority, CSP, patient, doctor and specialist. It means that they may prefer to find some social friends with part of their symptoms
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