Improved Lightweight SAFER Encryption by Using S-Boxes at Diffusion Layer for IoT Devices

Abstract

Advancements of communication increase the growth of IoT, where devices are interconnected with each other withthe help of the Internet. IoT is the combination of heterogeneous devices and each device has different hardwareand features. We have to make sure that communication is secured within the network. The physical layer of IoT hasbelonged to the devices and sensors which are the data generating part of the network. To send data over the networksecurely, a lightweight reliable encryption method for IoT devices over the network is required. IoT devices have lowcost and having a small circuit with low computation power. We required an encryption technique that needs to bevery suitable for this type of device, which requires low memory and low computation power for the encryption anddecryption of data. IoT network consists of heterogeneous devices with different security levels. During transmission,data encryption is the most important thing because of the heterogeneous nature of devices. We have different deviceswith different power, cost and hardware properties. There must be an encryption algorithm that fulfills our requirementsand suitable for low-cost devices as well. In this paper, we propose an encryption scheme that is designed for IoT on thebases of low memory and low computation power. This technique requires less memory for S-Boxes storage and hasmore security. It is based on the SAFER encryption algorithm which is improved with the help of S-Box implementation.

Keywords

• iot
• encryption
• safer
• s-boxes
• security