Attribute-Based Encryption for Healthcare Data Policy Hiding Model
Nowadays,with the rapid development of Internet technology,data privacy security is widely concerned.The medical industry is closely related to people's lives,and a large amount of valuable and private patient data is stored in medical information systems,and attri-bute-based encryption is a very good solution to the problem of fine-grained one-to-many access control encryption.However,there are some issues with current attribute-based encryption techniques,such as exposed ciphertext access policy and inefficient decryption.Therefore,this paper proposes an attribute-based encryption access control model(HO-CP-ABE)that supports access policy hiding and efficient decryp-tion,which addresses the current problem of hiding access policy based on LSSS linear secret sharing to ensure ciphertext access policy priva-cy and security,and introduces outsourcing decryption technology to give most of the decryption tasks to cloud servers to relieve the computing pressure on the user side.In the performance analysis,compared with traditional solutions,this solution not only improves the security of ci-phertext data storage,but also successfully reduces the user decryption overhead to a constant level,which effectively improving the overall system efficiency.
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