Differential Power Analysis (DPA) is a powerful and practical technique used to attack a cryptographic implementation in a resourcelimited application environment. Despite the extensive research on DPA of AES, it seems none has explicitly addressed the fundamental issue: How far should we protect the first and last parts of AES in order to resist practical DPA attacks, namely first and second-o...

AIMS To identify substantive findings of potential clinical and managerial significance from a regional feasibility study of adverse events (AEs). METHODS A standardised protocol using structured implicit review was applied to 142 AEs generated in an audit study of three public hospitals in the Auckland region for admissions in 1995. Areas of potential significance addressed were: timing, loc...

Rationale Theta oscillations (4-8 Hz) in the hippocampus and the neocortex have been suggested to play a role in the encoding of new memories and long-term plasticity. Intracranial electrode field potential recordings provide high temporal and spatial resolution for studying these oscillations in humans during cognitive tasks. In humans, theta oscillations have been observed in many structures,...

In order to evaluate the effect of pre-heating on biosolubility and water-resistance of alkaline earth silicate (AES) fibers in MgO-SrO-SiO2 and MgO-CaO-SrO-SiO2 compositions, dissolution experiments of the heat-treated (from 110 degrees C to 1,260 degrees C) AES fibers have been carried out in a glycine solution and in distilled water at 40 degrees C for 50 h. The dissolution experiments show ...

In the present day, AES is one the most widely used and most secure Encryption Systems prevailing. So, naturally lots of research work is going on to mount a significant attack on AES. Many different forms of Linear and differential cryptanalysis have been performed on AES. Of late, an active area of research has been Algebraic Cryptanalysis of AES, where although fast progress is being made, t...

Recently a lot of attention is paid to the search for efficiently implementable MDS matrices for lightweight symmetric primitives. Most previous work concentrated on locally optimizing the multiplication with single matrix elements. Separate from this line of work, several heuristics were developed to find shortest linear straightline programs. Solving this problem actually corresponds to globa...

In October 2001, after a 3-year evaluation process, NIST announced its decision to propose the Belgian algorithm Rijndael for the AES. In this paper, we discuss some of the work that has been done on Rijndael since its selection as the AES. We also outline briefly the design of a related cipher, called Anubis, and compare both designs.