DRACO Stream Cipher

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...

The rakaposhi Stream Cipher

In this paper, we introduce the rakaposhi stream cipher. The algorithm is based on Dynamic Linear Feedback Shift Registers, with a simple and potentially scalable design, and is particularly suitable for hardware applications with restricted resources. The rakaposhi stream cipher offers 128-bit security, and aims to complement the current eSTREAM portfolio of hardware-oriented stream ciphers.

The Stream Cipher Rabbit

1 This is version 1.1 of the cipher specification as submitted to the eStream project. The only changes in comparison to version 1.0 are some additions to section 7 on computational efficiency and a new appendix A, which describes an 80-bit key setup.

The Achterbahn Stream Cipher

Stream Cipher HC - 256 ?

HC-256 is a software-efficient stream cipher. It generates keystream from a 256-bit secret key and a 256-bit initialization vector. The encryption speed of the C implementation of HC-256 is about 1.9 bits per clock cycle (4.2 cycles/byte) on the Intel Pentium 4 processor.