Using symmetric and asymmetric cryptography to secure communication between devices in IoT

Internet of Things (IoT) allows the interconnection of computing and sensing devices over the Internet, allowing them to send and receive data. The applications of IoT range from Smart Home to Wearable devices. An IoT system has high security requirements, owing to the critical and sensitive nature of the information exchanged between devices. In this paper, a schematic consisting of Asymmetric and Symmetric cryptography is defined to secure the communication between the devices in an IoT system. The combination of both Symmetric and Asymmetric cryptography reduces encryption time in preference to simply using an Asymmetric cryptographic algorithm. The use of random keys for Symmetric encryption each time solves the issue of session-key distribution and strengthens the symmetric encryption approach.