Internet of Things (IoT) is considered as a key enabler of health
informatics. IoT-enabled devices are used for in-hospital and in-home patient
monitoring to collect and transfer biomedical data pertaining to blood
pressure, electrocardiography (ECG), blood sugar levels, body temperature, etc.
Among these devices, wearables have found their presence in a wide range of
healthcare applications. These devices generate data in real-time and transmit
them to nearby gateways and remote servers for processing and visualization.
The data transmitted by these devices are vulnerable to a range of adversarial
threats, and as such, privacy and integrity need to be preserved. In this
paper, we present LightIoT, a lightweight and secure communication approach for
data exchanged among the devices of a healthcare infrastructure. LightIoT
operates in three phases: initialization, pairing, and authentication. These
phases ensure the reliable transmission of data by establishing secure sessions
among the communicating entities (wearables, gateways and a remote server).
Statistical results exhibit that our scheme is lightweight, robust, and
resilient against a wide range of adversarial attacks and incurs much lower
computational and communication overhead for the transmitted data in the
presence of existing approaches.

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