FPGA Implementation of Rectangle Lightweight Block Cipher

Abstract

Abstract: Block ciphers are basic building blocks for network security. In recent years, designing a lightweight block cipher is the main goal of VLSI design engineers. In this paper, we have designed and verified the functionality of the RECTANGLE block cipher which is one of the lightweight block cipher using Modelsim simulator and implemented using Intel Quartus Prime 18.0 FPGA device. Using the bit-slice technique a RECTANGLE block cipher allows lightweight and fast implementations. The en-cryption architecture has two parts one is round transformation and the other is key scheduling. RECTANGLE uses Substitution-Permutation network. It takes 64-bit plain text and an 80-bit key as an input and converts it into a 64-bit ciphertext. There are three main advantages of using the RECTANGLE block cipher. First, it has a simple design. Second, it is very hardware friendly. By selecting the proper S-block RECTANGLE can achieve good security performance. Index Terms: Lightweight Block Cipher, Block Ciphers, Encryption, Bit-slice technique, Round Transformation, Key Scheduling, Substitution Block, Permutation Block.