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However, there are still challenges, such as storing sensitive data in untrusted and controlled infrastructure and ensuring the secure transmission of medical data, among others. The rapid development of watermarking provides opportunities for smart healthcare. In this article, we propose a new data-sharing framework and a data access control mechanism. The applications are submitted by the doctors, and the data is processed in the medical data center of the hospital, stored in semi-trusted servers to support the selective sharing of electronic medical records from different medical institutions between different doctors. Our approach ensures that privacy concerns are taken into account when processing requests for access to patients\u2019 medical information. For accountability, after data is modified or leaked, both patients and doctors must add digital watermarks associated with their identification when uploading data. Extensive analytical and experimental results are presented that show the security and efficiency of our proposed scheme.<\/jats:p>","DOI":"10.1145\/3408322","type":"journal-article","created":{"date-parts":[[2020,12,17]],"date-time":"2020-12-17T18:17:32Z","timestamp":1608229052000},"page":"1-18","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":42,"title":["Privacy Protection for Medical Data Sharing in Smart Healthcare"],"prefix":"10.1145","volume":"16","author":[{"given":"Liming","family":"Fang","sequence":"first","affiliation":[{"name":"Nanjing University of Aeronautics and Astronautics and Collaborative Innovation Center of Novel Software Technology and Industrialization, Nanjing, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Changchun","family":"Yin","sequence":"additional","affiliation":[{"name":"Nanjing University of Aeronautics and Astronautics, Nanjing, 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