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Cloud computing has been developing at a rapid speed, playing an important role in many fields, especially in environments like hospitals which produce a lot of data every day and have specific users. Because the security of the information stored in the cloud cannot be guaranteed, we propose a safe cloud storage of medical information based on attribute encryption. This paper focuses on how to apply attribute-based encryption to hospitals' cloud storage environment, and to design the access process of different users in the cloud environment by using attribute encryption. Our goal is to build a scheme based on attribute encryption in which users with different demands can get the information they need in a safe and convenient way from the cloud server. In the scheme, sensitive information of a patient was encrypted locally based on attributes and then uploaded to the cloud server. We divided the users in the scheme into three kinds: the chief doctor, the doctor who is not in charge of the patient and the patient. Different users have a different way to get information stored in the cloud, and the decryption of the sensitive information is also different. For each step in the scheme, we carried out a security analysis to demonstrate the reliability, security and applicability of our scheme. Keywords—cloud storage; attribute-based encryption; medical information security

Safe Cloud Storage of Medical Information Based on Attribute Encryption