Three defensin-like peptides (DLPs) were isolated from platypus venom and sequenced. One of these peptides, DLP-1, was synthesized chemically and its three-dimensional structure was determined using NMR spectroscopy. The main structural elements of this 42-residue peptide were an anti-parallel beta-sheet comprising residues 15-18 and 37-40 and a small 3(10) helix spanning residues 10-12. The ov...

This document is an evaluation of the discrete logarithm problem over finite fields (DLP), as a basis for designing cryptographic schemes. It relies on the analysis of numerous research papers on the subject. The present report is organized as follows: firstly, we review the DLP and several related problems such as the Diffie-Hellman problem. Next, we analyze the various algorithms that are cur...

This paper proposes a new signature scheme based on two hard problems : the cube root extraction modulo a composite moduli (which is equivalent to the factorisation of the moduli, IFP) and the discrete logarithm problem(DLP). By combining these two cryptographic assumptions, we introduce an efficient and strongly secure signature scheme. We show that if an adversary can break the new scheme wit...

We present an index calculus algorithm which is particularly well suited to solve the discrete logarithm problem (DLP) in degree 0 class groups of curves over finite fields which are represented by plane models of small degree. A heuristic analysis of our algorithm indicates that asymptotically for varying q, “almost all” instances of the DLP in degree 0 class groups of curves represented by pl...

Recently, lay and scientific reports have raised concerns regarding the radiation doses associated with CCTA. These published data remain confusing for the nonphysicist, given the complexity of measuring radiation exposure and estimating risk. Radiation imparted by CT is most easily described by the dose-length product (DLP), a summary measure of the integral of radiation dose and scan length. ...

Recently, the well-known Diie-Hellman key exchange protocol was extended to real quadratic congruence function elds in a non-group based setting. Here, the underlying key space was the set of reduced principal ideals. This set does not possess a group structure, but instead exhibits a so-called infrastructure. The techniques are the same as in the protocol based on real quadratic number elds. A...

In the entertainment industry’s quest for the “suspension of disbelief,” two primary sensory stimuli have been engaged: sight and sound. Since the advent of digital audio, a number of new multitrack digital sound formats have appeared in the motion picture industry, all in an attempt to achieve the ultimate audio experience. However, visual presentation has not advanced at the same pace as the ...