FoG Assisted Secure De-duplicated Data Dissemination in Smart Healthcare IoT

With the rapid enhancement of medical sensors, it has gain growing interest to explore the Healthcare Internet of Things (H-IoT) due to its wide applicability for patient's health monitoring. It involves a large quantity of smart devices for sensing health parameters including temperature, heartbeat, blood pressure and patient mobility. The medial sensing devices are connected with a somehow more powerful device like cell phone to exchange health parameters based data to central repositories at cloud. During data aggregation process, the collector nodes receive duplicate values that should be eliminated to reduce communication overheads. Due to sensitive nature of data, it must provide the secure data exchange to guard against various security attacks. To resolve these issues, we have presented a Secure De-duplicated Data Dissemination (S-DDD) scheme for healthcare IoT scenario using FoG servers at the edge of the network. To remove redundancy, we have also proposed a lightweight de-duplication mechanism that includes adaptive chunking algorithm (ACA) for identifying the cut-point between two windows. Moreover, we propose a symmetric key based encryption mechanism for healthcare data exchange from smart devices towards a collector node. We have simulated our work using NS-2.35. Results prove the supremacy of our scheme over counterparts in terms of cut-point identification failure, fixed and variable length chunk size.