Patient medical data is the key data of an e-health application. Medical data frequently play an important role in disease analysis and are implicated in motivating values for educating diagnostic methods and modifying diagnostic results. Confidentiality of patient health documents is more important, and therefore researchers have considered many security measures, including access control, confidentiality, and integrity of these documents. To solve the security problem, this paper presents an advanced solution based on converting medical data into compact size, in the form of QR code before being deployed on our Blockchain. In this way, performing complex operations will be safely performed off-chain, such as collecting and preprocessing patient data, while submission of this data is done on an hourly basis. Chain. We recommend a data flow architecture that combines the Internet of Things (IoT) with blockchain (especially the Ethereum architecture), using smart contracts to access and store data while keeping Strong against many attacks. Our proposed system is effective in sharing and managing patient electronic health data. The tests involved implementing Ethereum chain configurations on PCs and two embedded IoT platforms, namely Raspberry Pi and PYNQ cards. Performance is evaluated in terms of security, execution time, memory, power and CPU consumption of various patient data scenarios.

Because of the availability of more than an actor and a wireless component in an e-health application, providing more security and safety to users of this type of applications is expected. Moreover, ensuring protection of data user available or shared within different services from any security attack becomes an important requirement. In this paper, we are interested essentially in the authentication process, and we propose an improved Landmarkbased algorithm as a tool to extract, firstly, key features from analysed faces, and hence to accelerate the authentication operation. The suggested approach beats other state-of-the-art works in terms of accuracy and speed-up attaining time execution constraint, according to experimental evaluations.