B‐SCORE – A blockchain based hybrid chaotic signatures for medical image encryption in an IoT environment

Internet of things (IoT) has evolved exponentially in the recent years and its applications are also being explored in the medical field. Due to this, the volume of medical images transmitted has increased multifold. Usage of IoT networks for medical image transmission has significantly reduced the time needed for clinical diagnosis and thereby increasing treatment efficiency. However at present, IoT networks are open to various security threats, which may affect the sensitive and private information that are present in patient's medical image datasets. Existing studies reveal the need of improvisation for secured medical data transmission over IoT networks. In the context to IoT security issues, this research paper proposes blockchain architecture integrated with chaotic encrypted medical image transmission to ensure the high security in medical image transmission. The proposed system incorporates tri‐layered architecture such as Image Aware Segmentation (IAS), hybrid chaotic encryption scheme and finally blockchain environment. The extensive experimentation has been carried out in which the performance parameters such as entropy, NACI and UACI (Number of Pixel Change Ratio and Unified Average Changed Intensity) were calculated and analyzed. It is found that the proposed architecture has NPCR as 99.65%, UACI as 33.95% and entropy ideally close to 8. Encryption results show that the proposed architecture exhibited more randomness, which can defend the IoT security threats.