A Hybrid Lightweight Cryptographic Scheme For Securing Node Data Based On The Feistel Cipher And MD5 Hash Algorithm In A Local IoT Network

A cryptographic-based encryption algorithm that has low memory and minimal output space requirements as well as involving reduced computational overheads without compromising the strength and security of the encryption is desired for constrained devices in wireless sensor networks. Internet-of-Things (IoT) supports the automated collection and streaming of sensitive data across several other devices through the internet. The insecurity of the internet in supporting communication of critical data between nodes in IoT has been amplified due to the current data breaches and data privacy compromises on such networks in recent times. The paper addresses the challenge of data privacy and integrity breaches among IoT devices with the proposition of a methodology involving a thin cryptographic scheme that combines the Feistel cipher and the MD5 in providing improved security for IoT node data. The results showed an enhanced and fast encryption of data between IoT edge devices and the sink node.