A fundamental objective of cryptography is to enable two persons to communicate over an
insecure channel (a public channel such as the internet) in such a way that any other person …

A classical construction of stream ciphers is to combine several LFSRs and a highly non-
linear Boolean function f. Their security is usually analysed in terms of correlation attacks …

The question “Stream ciphers: dead or alive?” was posed by Adi Shamir. Intended to
provoke debate, the question could not have been better, or more starkly, put. However, it …

Recently, algebraic attacks have received a lot of attention in the cryptographic literature. It
has been observed that a Boolean function f used as a cryptographic primitive, and …

In numerous encryption frameworks, the first information is changed into encoded form by
applying nonlinear substitutions and affecting diffusion. The goal of the nonlinear change is …

So far there is no systematic attempt to construct Boolean functions with maximum
annihilator immunity. In this paper we present a construction keeping in mind the basic …

After the improvement by Courtois and Meier of the algebraic attacks on stream ciphers and
the introduction of the related notion of algebraic immunity, several constructions of infinite …

Sosemanuk is a new synchronous software-oriented stream cipher, corresponding to Profile
1 of the ECRYPT call for stream cipher primitives. Its key length is variable between 128 and …

In this paper, a combinatorial conjecture about binary strings is proposed. Under the
assumption that the proposed conjecture is correct, two classes of Boolean functions with …

In this paper, we analyze the algebraic immunity of symmetric Boolean functions. The
algebraic immunity is a property which measures the resistance against the algebraic …