Results 91 to 100 of about 880,434 (384)

Constructing Covalent Organic Polymers through Dative B─N Bonds: Synthesis, Single Crystal Structures, and Physical Properties

open access: yesAdvanced Functional Materials, EarlyView.
Dynamic linkages are highly attractive in preparing single crystals of covalent organic polymers (COPs). Here, single crystals of two COPs CityU‐15 and CityU‐16 based on reversible B─N bonds are constructed using tetra(4‐pyridyl)tetrathiafulvalene and tetra(4‐pyridyl)porphine as monomers.
Xin Wang   +7 more
wiley   +1 more source

Speech Encryption using Fixed Point Chaos based Stream Cipher (FPC-SC) [PDF]

open access: yesEngineering and Technology Journal, 2016
Fixed point chaos based stream cipher (FPC-SC) is presented in this paper to encrypt the speech signal. Fixed point chaos based pseudo random bit generator (FPC-PRBG) is used as key sequence in stream cipher system. Two chaotic Lorenz and Chen systemsare
Fadhil S. Hasan
doaj   +1 more source

Разработка методов построения потоковых шифров [PDF]

open access: yes, 2006
Современные требования к криптографии накладывают жесткие рамки к скорости обработки информации. В данном ключе актуальными становятся потоковые алгоритмы шифрования.
Севрук, А.О.
core  

Exploring Dipolar Dynamics and Ionic Transport in Metal‐Organic Frameworks: Experimental and Theoretical Insights

open access: yesAdvanced Functional Materials, EarlyView.
In this study, the interplay of dipolar dynamics and ionic charge transport in MOF compounds is investigated. Synthesizing the novel structure CFA‐25 with integrated freely rotating dipolar groups, local and macroscopic effects, including interactions with Cs cations are explored.
Ralph Freund   +6 more
wiley   +1 more source

Analysis of Solitaire [PDF]

open access: yesarXiv, 2019
The Solitaire cipher was designed by Bruce Schneier as a plot point in the novel Cryptonomicon by Neal Stephenson. The cipher is intended to fit the archetype of a modern stream cipher whilst being implementable by hand using a standard deck of cards with two jokers.
arxiv  

Stream/block ciphers, difference equations and algebraic attacks [PDF]

open access: yesarXiv, 2020
In this paper we model a class of stream and block ciphers as systems of (ordinary) explicit difference equations over a finite field. We call this class "difference ciphers" and we show that ciphers of application interest, as for example systems of LFSRs with a combiner, Trivium and Keeloq, belong to the class.
arxiv  

An Improved Linear Feedback Shift Register (LFSR- based) Stream Cipher Generator [PDF]

open access: yes, 2009
Linear feedback shift register ( LFSR-based) stream cipher an improved design for a random key generator in a stream cipher algorithm. The proposed random key generator is simply designed to produce a very quick algorithm to be used for securing GSM ...
Mahdi, Reyadh H
core  

Direct Ink Writing of Conductive Hydrogels

open access: yesAdvanced Functional Materials, EarlyView.
This review examines the use of direct ink writing (DIW) for fabricating conductive hydrogels with customizable 3D structures. It outlines the rheological requirements for successful DIW, followed by an exploration of the materials and ink formulations used to impart electronic and/or ionic conductivity to hydrogels while maintaining printability ...
Monica Ho   +6 more
wiley   +1 more source

IMPLEMENTASI KRIPTOGRAFI MENGGUNAKAN METODE SHIFT CIPHER, STREAM CIPHER, DAN ELECTRONIC CODE BOOK [PDF]

open access: yes, 2013
Keamanan data merupakan hal yang sangat penting dalam menjaga kerahasiaan pesan terutama yang berisi pesan penting. Dari berbagai macam teknik kriptografi yang berkembang saat ini, dibuat suatu implementasi kriptografi yang kuat menggunakan metode ...
Darlianingrum, Dewi - 085410286
core  

Hydrogel‐Based Photothermal‐Catalytic Membrane for Efficient Cogeneration of Freshwater and Hydrogen in Membrane Distillation System

open access: yesAdvanced Functional Materials, EarlyView.
This work presents an overview of the PTC‐VMD system for water‐hydrogen co‐generation. a) Illustration of the hydrogel‐based PTC membrane and the co‐generation of water and hydrogen. b) Structure of the PTC‐VMD system and the functions of each component layer.
Jiawei Sun   +7 more
wiley   +1 more source

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