Bias in the LEVIATHAN Stream Cipher

The Stream Cipher Leviathan Specification and Supporting Documentation

High-speed architectures for binary-tree based stream ciphers: Leviathan case study

Abstract Real-time applications such as streaming media and voice require encryption algorithms that do not propagate errors and support fast encryption on small blocks. Since IP packets are delivered out-of-order in routed networks it is difficult to synchronize the source and the destination, therefore requiring encryption algorithms to support out-of-order generation of key stream. In this p...

A Stream Cipher Based on Chaotic Permutations

In this paper we introduce a word-based stream cipher consisting of a chaotic part operating as a chaotic permutation and a linear part, both of which designed on a finite field. We will show that this system can operate in both synchronized and self-synchronized modes. More specifically, we show that in the self-synchronized mode the stream cipher has a receiver operating as an unknown input o...

Biometric Authentication of Fingerprint for Banking Users, Using Stream Cipher Algorithm

Providing banking services, especially online banking and electronic payment systems, has always been associated with high concerns about security risks. In this paper, customer authentication for their transactions in electronic banking has been discussed, and a more appropriate way of using biometric fingerprint data, as well as encrypting those data in a different way, has been suggest...

Differential Cryptanalysis of Salsa20/8

This paper presents a cryptanalysis of the Salsa20 stream cipher proposed in 2005. Salsa20 was submitted to eSTREAM, the ECRYPT Stream Cipher Project. The cipher uses bitwise XOR, addition modulo 2, and constant-distance rotation operations on an internal state of 16 32-bit words. It is reported that there is a significant bias in the differential probability for Salsa20’s 4 round internal stat...