On toy ageing

On Toy Aging

We consider the dynamics of a simple one dimensional model and we discuss the phenomenon of aging (i.e., the strong dependence of the dynamical correlation functions over the waiting time). Our model is the so-called random random walk, the toy model of a directed polymer evolving in a random medium. ROMA LA SAPIENZA 962-93, cond-mat/9308003

The Cube Attack on Courtois Toy Cipher

The cube attack has been introduced by Itai Dinur and Adi Shamir [8] as a known plaintext attack on symmetric primitives. The attack has been applied to reduced variants of the stream ciphers Trivium [3, 8] and Grain-128 [2], reduced to three rounds variant of the block cipher Serpent [9] and reduced version of the hash function MD6 [3]. In the special case the attack has appeared in the M. Vie...

Algebraic Attacks on the Courtois Toy Cipher

Block ciphers are fundamental building block of modern cryptography. Recently, a new technique to attack block ciphers has emerged called “algebraic attacks”. These attacks work by expressing block ciphers as quadratic equation systems and solving those systems of equations. In May 2006 Nicolas Courtois – author of many influential research papers on algebraic attacks – presented a toy cipher c...

Environmental Perspectives on Ageing

According to Dannefer, context, broadly defined,1 ‘refers to the totality of the diverse range of phenomena, events and forces that exist outside the developing individual’ (1992: 84). The assumption that ageing occurs in context has meanwhile become, implicitly or explicitly, a core feature of models of ageing in biology, as well as those in the social and behavioural sciences. How such contex...

Far From Toy Trains