Blockchain-assisted lightweight access control scheme for IoT-based smart healthcare system
The IoT-based smart healthcare system brings great convenience to both patients and medical workers.However,the enormous medical data generated by the IoMT devices contain personal sensitive information of patients.Once leaked,it will cause great losses to patients.Previous access control schemes have problems such as inflexibility,centralization,and low encryption efficiency.To solve these problems,we propose a blockchain-assisted lightweight access control scheme for IoT-based smart healthcare system.Firstly,an improved multi-authority attribute-based encryption(MA-ABE)scheme is proposed to provide fine-grained secure data sharing,and IPFS technology is used to store data of patients.Secondly,fog nodes are introduced to carry out most of the computing overhead and reduce the burden on IoMT devices.Finally,through the security analysis and simulation experiments,the results show that our proposed scheme provides medical data with effi-cient and lightweight access control while ensuring security.
万方数据
维普
