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With the increasing breaches and security threats that endanger health data,ensuring patients' privacy is essential. To that end, the research communityhas proposed various privacy-preserving approaches based on cryptography,hashing, or ledger technologies for alleviating health data vulnerability. Toestablish a comprehensive understanding of health data privacy risks, and thebenefits and limitations of existing privacy-preserving approaches, we performa detailed review of existing work and distill 10 distinct privacy concernsoccurring in a health data lifecycle. Furthermore, we classify existingapproaches based on their applicability to particular privacy concernsoccurring at a particular lifecycle stage. Finally, we propose a taxonomy oftechniques used for privacy preservation in healthcare and triangulate thosetechniques with the lifecycle stages and concerns. Our review indicates heavyusage of cryptographical techniques in this domain. However, we have also foundthat healthcare systems have special requirements that require novelcryptographic techniques and security schemes to address special needs.Therefore, we identify several future research directions to mitigate thesecurity challenges for privacy preservation in health data management.

A Survey on Privacy of Health Data Lifecycle: A Taxonomy, Review, and Future Directions