%A TU Yuan-fei,ZHANG Cheng-zhen %T Secure and Efficient Electronic Health Records for Cloud %0 Journal Article %D 2020 %J Computer Science %R 10.11896/jsjkx.181202256 %P 294-299 %V 47 %N 2 %U {https://www.jsjkx.com/CN/abstract/article_18904.shtml} %8 2020-02-15 %X With the development and popularty of mobile devices,Electronic Health Record-based BAN is becoming more and more popular.People can back up the medical data acquired by the Body Area Network (BAN) to the cloud,which makes it possible for medical workers to accessed the user’s medical data using mobile terminals almost anywhere.However,for some patients,these medical data are personal privacy and they only wantto be accessed by someone with some rights.This paper proposed an efficient and secure fine-grained access control scheme,which not only enables authorized users to access medical data stored in the cloud,but also supports some privileged doctors to write records.In order to improve effciency of whole system,a method of matching before decryption is added to perform decryption tests without decryption.In addition,this scheme can outsource the bilinear pairing operation to the gateway without leaking the data content so that eliminates the user’s computation overhead.Performance evaluation shows that efficiency of proposed solution in computating,communication and storage has been significantly improved.