Propose A Lightweight Block Cipher Algorithm For Securing Internet of Things

Abstract

This paper introduces a modern lightweight symmetric algorithm for securing the Internet of Things (IoT) applications. The lightweight cipher is considered a new trend of cryptographic design that aims at developing an elegant cipher with low cost construction for embedded devices. The proposed cipher designed to support a 64-bit secret key and encrypt a 64-bit block of electronic data. The proposed algorithm iterated with 24-rounds of Feistel network structure. The main round works as a product cipher that encompasses different layers similar to the round transformation of substitution–permutation network SPN structure. The main round includes four elementary stages Sbox stage, shifting stage, MixColumn stage and adding keys stage. The first is a non-linear stage that undertakes the responsibility of increasing the confusion property. The shifting stage is designed in an easy and simple way to be convenient for restricted resources. The MixColumn stage is designed in accordance with half-byte oriented structure. The produced cipher has been tested according to several metrics and it has given accepted results. Also, it has passed the NIST statistical randomness tests with a typical time of implementation.