We propose two parallelisable variants of Camellia and SMS4 block ciphers based on the n-cell GF-NLFSR. The n-cell generalised Feistel-non-linear feedback shift register (GF-NLFSR) structure (Choy et al., 2009a) is a generalised unbalanced Feistel network that can be considered as a generalisation of the outer function FO of the KASUMI block cipher. An advantage of this cipher over other n-cell...

MUGI [15] is a word-based stream cipher designed for 64bit architectures. It uses a 128-bit master key and a 128-bit initialization vector to populate a large non-linear feedback shift register (NLFSR) and additional non-linear state (NLS). In standard benchmarks on 32-bit processors, MUGI suffers from poor key agility because it is implemented on an architecture for which it is not designed, a...

An arithmetic version of the crosscorrelation of two sequences is defined, generalizing Mandelbaum’s arithmetic autocorrelations. Large families of sequences are constructed with ideal (vanishing) arithmetic crosscorrelations. These sequences are decimations of the 2adic expansions of rational numbers p=q such that 2 is a primitive root modulo q.

A New Class of Stream Ciphers Combining LFSR and FCSR Architectures 22 François Arnault, Thierry P. Berger, and Abdelkader Necer Slide Attack on Spectr-H64 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Selçuk Kavut and Melek D. Yücel On Differential Properties of Pseudo-Hadamard Transform and Related Mappings (Extended Abstract) . . . . . . ....

We propose a new additive binary stream cipher called Achterbahn. The keystream generator (KSG) consists of eight primitive binary nonlinear feedback shift registers (NLFSR’s). A binary N -stage feedback shift register is called primitive if it has a cycle of length 2N − 1 containing all binary nonzero N tuples. Each shift register has a configurable linear feedforward output function. The outp...

Cryptographically strong sequences should have a large 2-adic complexity to thwart the known feedback with carry shift register (FCSR) synthesis algorithms. At the same time the change of a few terms should not cause a significant decrease of the 2-adic complexity. This requirement leads to the concept of the k-error 2-adic complexity. In this paper, an algorithm for computing the k-error 2-adi...

In recent years, with fast growth of mobile communication and portable computing systems, design for low power has become the challenge in the field of Digital VLSI design. The main focus of the paper is to make a comparative study of low power Linear Feedback Shift Register (LFSR) architecture such as Built In Self Test (BIST), it has been often seen that during test mode process the power con...

Test Pattern Generators (TPG) are very important logic part of the Circuits that have self-test features. Nowadays, the self-test feature is an in-built part of the modern application hardware designs. This feature enables the user to test and verify the specific hardware failure with the help of the hardware itself. To enable self-test an extra operational and control circuit is required by th...

the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Abstract In this paper, we design a self-shrinking scheme which combines a feedback with carry shift register and the self-shrinking generator, based on A. Kanso PhD study. We calculated the period of the designed algorithm. The ke...