Results 91 to 100 of about 3,524 (301)
Criptografia usando curvas hiperelípticas
Revista Integración, 2006 In this work we present some properties of the hyperelliptical curves and their Jacobians, aiming at the implementation of criptossystems of public key.
Alonso Sepúlveda Castellanos
doaj
In this paper we present two algorithms for computing discrete logarithms. We present some properties and show how we break the Diffie-Hellman protocol, which is considered to be very secure.
openaire +1 more source
Advanced Materials, EarlyView.This study demonstrates a self‐assembly process to generate free‐standing piezoelectric nanomembranes, forming ultracompact microtubular acoustic wave sensors and actuators. The miniaturized 3D piezoelectric platform reported in this work can be applied in telecommunication, energy harvesting, and acoustofluidics. Moreover, the 3D self‐assembly can add
Raphaël C. L‐M. Doineau +9 more
wiley +1 more source
Improved Time-Frequency Features and Electrode Placement for EEG-Based Biometric Person Recognition
IEEE Access, 2019 This paper introduces a novel feature extraction method for biometric recognition using EEG data and provides an analysis of the impact of electrode placements on performance. The feature extraction method is based on the wavelet transform of the raw EEG
Su Yang, Sanaul Hoque, Farzin Deravi
doaj +1 more source
Remarks on some signature schemes based on factoring and discrete logarithms
, 2014 Recently, He [Digital signature scheme based on factoring and discrete logarithms, Electronics Letters 37 (4) (2001) 220-222], Hwang et al. [Improved digital signature scheme based on factoring and discrete logarithms, Journal of Discrete Mathematical ...
洪國寶 +3 more
core +1 more source
POM‐Based Water Splitting Catalyst Under Acid Conditions Driven by Its Assembly on Carbon Nanotubes
Advanced Materials, EarlyView.A newly‐engineered POM‐based electrocatalyst incorporating non‐innocent counter cations exhibits fast kinetics for either the OER or HER under strongly acidic conditions (1 m H2SO4), depending on whether it is assembled on carbon nanotubes (1@CNT) or physically mixed with them (1/CNT). In water‐splitting tests using a two‐electrode setup, these systems
Eugenia P. Quirós‐Díez +8 more
wiley +1 more source
Mechanically Programmable DNA Hydrogel Microparticles for 3D Cellular Systems
Advanced Materials, EarlyView.DNA hydrogel microparticles are designed to exhibit controllable viscoelasticity and stiffness across three orders of magnitude from 30Pa$30 \,\mathrm{Pa}$ to 6.5kPa$6.5 \,\mathrm{kPa}$. They are uptaken into fibroblast spheroids where they are actively remodeled by cellular forces depending on their mechanical properties.
Tobias Walther +9 more
wiley +1 more source
Revisiting Discrete Logarithm Reductions
IACR Communications in CryptologyA reduction showing that the hardness of the discrete logarithm (DL) assumption implies the hardness of the computational Diffie-Hellman (CDH) assumption, given a suitable auxiliary input as advice, was first presented by den Boer [Crypto, 88]. We consider groups of prime order p, where p-1 is somewhat smooth (say, every prime q that divides p-1 ...
Maiara F. Bollauf +2 more
openaire +2 more sources
Computing Discrete Logarithms in Quadratic Orders [PDF]
Journal of Cryptology, 2000 Let \(\Delta \equiv 0,1 \pmod{4}\) be a nonsquare integer. The quadratic order of discriminant \(\Delta\) is defined as the \(\mathbb{Z}\)-module \[ \mathcal{O}_{\Delta} = \mathbb{Z} + {\Delta + \sqrt{\Delta} \over 2}{\mathbb{Z}} . \] The field of quotients is \(\mathbb{Q}({\sqrt{\Delta}})\).
openaire +1 more source
Security of almost ALL discrete log bits
, 2005 Let G be a finite cyclic group with generator \alpha and with an encoding so that multiplication is computable in polynomial time. We study the security of bits of the discrete log x when given \exp_{\alpha}(x), assuming that the exponentiation function \
Schnorr, Claus Peter
core