Recent results by Alagic and Russell have given some evidence that the Even-Mansour cipher may be secure against quantum adversaries with quantum queries, if considered over other groups than (Z/2)n. This prompts the question as to whether or not other classical schemes may be generalized to arbitrary groups and whether classical results still apply to those generalized schemes. In this thesis,...

A t-round key-alternating cipher (also called iterated Even-Mansour cipher) can be viewed as an abstraction of AES. It defines a cipher E from t fixed public permutations P1, . . . , Pt : {0, 1} → {0, 1} and a key k = k0‖ · · · ‖kt ∈ {0, 1} by setting Ek(x) = kt⊕Pt(kt−1⊕Pt−1(· · · k1⊕P1(k0⊕ x) · · · )). The indistinguishability of Ek from a truly random permutation by an adversary who also has ...

Bethe-Salpeter equation in the non-commutative space for a scalarscalar bound state is considered. It is shown that in the non-relativistic limit, the effect of spatial non-commutativity appears as if there exist a magnetic dipole moment coupled to each particle. e-mail: [email protected] e-mail: [email protected] Non-commutativity of space-time has been recently a subject of intense ...

In [1] a construction of a block cipher from a single pseudorandom permutation is proposed. In a complexity theoretical setting they prove that this scheme is secure against a polynomially bounded adversary. In this paper it is shown that this construction suffers from severe limitations that are immediately apparent if differential cryptanalysis [3] is performed. The fact that these limitation...

Since the beginning of the last two decades, many researchers have been involved in the problem of Blind Source Separation (BSS). Whilst hundreds of algorithms have been proposed to solve BSS. These algorithms are well known as Independent Component Analysis (ICA) algorithms. Nowadays, ICA algorithms have been used to deal with various applications and they are using many performance indices. T...

We propose two-equation models in order to capture the dynamics of a turbulent plasma undergoing compression and experiencing large viscosity variations. The account for possible relaminarization phases rapid changes through closures dependent on Reynolds Froude numbers. These are determined from data-driven approach using eddy-damped quasi-normal Markovian simulations. best model is able mimic...

The iterated Even-Mansour construction defines a block cipher from a tuple of public n-bit permutations (P1, . . . , Pr) by alternatively xoring some n-bit round key ki, i = 0, . . . , r, and applying permutation Pi to the state. The tweakable Even-Mansour construction generalizes the conventional Even-Mansour construction by replacing the n-bit round keys by n-bit strings derived from a master...

In this paper we consider the following fundamental problem: What is the simplest possible construction of a block cipher which is provably secure in some formal sense? This problem motivated Even and Mansour to develop their scheme in 1991, but its exact security remained open for more than 20 years in the sense that the lower bound proof considered known plaintexts, whereas the best published...

Education has a final orientation as form of humanization, namely humanizing humans, and aims vehicle for liberation. One the figures who brought this idea up was Mansour Fakih, social activist is aggressively voicing education from point view marginalized. This study uses qualitative research methods with type literature study. The results show that Fakih's critical paradigm can improve domina...