Blockchain Architecture for Secure Storage of IoT Data

The article proposes a new approach to the transfer and storage of data, including from IoT devices, for medical systems to improve the information security of these systems. The proposed approach uses the blockchain methodology for storing batch and streaming information from various wearable devices designed to take medical indicators (blood pressure, pulse, temperature, etc.) in real time. For this, a blockchain from blockchains is used, which allows considering the peculiarity of biomedical data when they are presented in a distributed information storage. The article presents the storage architecture, describes data storage structures, and proposes pseudocode for creating a blockchain and adding information to it. A prototype of the system is presented, including services for receiving and processing information, as well as information retrieval. Computational experiments were performed to evaluate the performance of the system prototype on a test data set. Their results showed that the creation of new blockchains can be more time-consuming compared to traditional data storage. However, the proposed architecture, along with ensuring data protection, allows you to not lose the search speed.