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To solve the problem of efficiency and security existing in accessing control to personal health records (PHRs) through mobile client in the environment of Cloud Storage, we put forward a scheme for mobile applications' access policy of PHRs under a semi-trusted server framework through using attribute-based encryption (ABE) and focusing on the multiple security domains scenario in this paper. Simulation experimental results show the superiority of good security, efficiency and scalability in our program.
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Wang et al. (2014) studied this question.