We study ak-dimensional generalization of the birthday problem: given k lists of n-bit values,
find some way to choose one element from each list so that the resulting k values xor to zero …

A new version of the stream cipher Grain-128 is proposed. The new version, Grain-128a, is
strengthened against all known attacks and observations on the original Grain-128, and has …

A new stream cipher, Grain-128, is proposed. The design is very small in hardware and it
targets environments with very limited resources in gate count, power consumption, and chip …

In this paper we are proposing a new member in the SNOW family of stream ciphers, called
SNOW-V. The motivation is to meet an industry demand of very high speed encryption in a …

In this paper, we present some major algorithmic improvements to fast correlation attacks. In
previous articles about fast correlations, algorithmics never was the main topic. Instead, the …

In this paper a new word-oriented stream cipher, called SNOW, is proposed. The design of
the cipher is quite simple, consisting of a linear feedback shift register, feeding a finite state …

The Stream Cipher HC-128 Page 1 The Stream Cipher HC-128 Hongjun Wu Katholieke
Universiteit Leuven, ESAT/SCD-COSIC and IBBT Kasteelpark Arenberg 10, B-3001 Leuven-Heverlee …

The task of a fast correlation attack is to efficiently restore the initial content of a linear
feedback shift register in a stream cipher using a detected correlation with the output …

Cryptographic ciphers come in two flavours: symmetric (AES, etc.) and asymmetric (RSA,
etc.). The symmetric ciphers are further divided into block ciphers and stream ciphers. Block …

In these lecture notes we survey the state of the art in symmetric key encryption, in particular
in the block ciphers and stream ciphers area. The area of symmetric key encryption has …