KAMAR: A Lightweight Feistel Block Cipher Using Cellular Automata

LBlock: A Lightweight Block Cipher

In this paper, we propose a new lightweight block cipher called LBlock. Similar to many other lightweight block ciphers, the block size of LBlock is 64-bit and the key size is 80-bit. Our security evaluation shows that LBlock can achieve enough security margin against known attacks, such as differential cryptanalysis, linear cryptanalysis, impossible differential cryptanalysis and related-key a...

FeW: A Lightweight Block Cipher

In this paper, we propose a new lightweight block cipher called FeW 1 which encrypts 64-bit plaintext using key size 80/128 bits and produces 64-bit ciphertext. FeW is a software oriented design with the aim of achieving high efficiency in software based environments. We use a mix of Feistel and generalised Feistel structures (referred as Feistel-M structure hereinafter) to enhance the security...

AKF: A key alternating Feistel scheme for lightweight cipher designs

Elastic Block Ciphers: The Feistel Cipher Case

We discuss the elastic versions of block ciphers whose round function processes subsets of bits from the data block differently, such as occurs in a Feistel network and in MISTY1. We focus on how specific bits are selected to be swapped after each round when forming the elastic version, using an elastic version of MISTY1 and differential cryptanalysis to illustrate why this swap step must be ca...

Feistel-type Block Cipher by Bacteria Engineering

In this paper we propose a theoretical method for breaking a block cipher based on a Feistel structure which is a variant of DES (S-DES) using one pair of (plaintext, ciphertext). Our scheme utilizes bacterial computing for the first time in cryptanalysis. For this reason, we design and simulate an engineered gene regulatory network to break S-DES which possesses a superior performance than the...