Poly1305-AES is a state-of-the-art message-authentication code suitable for a wide variety
of applications. Poly1305-AES computes a 16-byte authenticator of a variable-length …

We present a new variant of cube attacks called a dynamic cube attack. Whereas standard
cube attacks [4] find the key by solving a system of linear equations in the key bits, the new …

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 …

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 …

Algebraic attack has recently become an important tool in cryptanalysing different stream
and block cipher systems. A Boolean function, when used in some cryptosystem, should be …

Based on a method proposed by the first author, several classes of balanced Boolean
functions with optimum algebraic immunity are constructed, and they have nonlinearities …

In this correspondence, we introduce a method to construct Boolean functions in any
number of variables, with optimal algebraic immunity. Remarkably, all functions of this type …

In this paper we present a new class of stream ciphers based on a very simple mechanism.
The heart of our method is a Feedback with Carry Shift Registers (FCSR) automaton. This …

Because of the recent algebraic attacks, a high algebraic immunity is now an absolutely
necessary (but not sufficient) property for Boolean functions used in stream ciphers. Very few …