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Related Concept Videos

Radical Formation: Abstraction00:47

Radical Formation: Abstraction

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The electron of an atom can be abstracted from a compound by a relatively unstable radical to generate a new radical of relatively greater stability. For example, an initiator which forms radicals by homolysis can abstract a suitable species like a hydrogen atom or a halogen atom from a compound to generate a new radical. This ability of radicals to propagate by abstraction is a crucial feature of radical chain reactions.
Even though homolysis produces radicals, it is different from radical...
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Block Diagram Reduction01:22

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The process of deriving the transfer function of a control system often involves reducing its block diagram to a single block. This simplification can be achieved through a series of strategic operations, including relocating branch points and comparators. These operations preserve the overall function of the system while allowing for easier manipulation and combination of blocks.
The first step in this process is the identification and relocation of a branch point. A branch point, where a...
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Crown Ethers02:36

Crown Ethers

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Crown ethers are cyclic polyethers that contain multiple oxygen atoms, usually arranged in a regular pattern. The first crown ether was synthesized by Charles Pederson while working at DuPont in 1967. For this work, Pedersen was co-awarded the 1987 Nobel Prize in Chemistry. Crown ethers are named using the formula x-crown-y, where x is the total number of atoms in the ring and y is the number of ether oxygen atoms. The term 'crown' refers to the crown-like shape that these ether molecules...
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Radical Formation: Overview01:03

Radical Formation: Overview

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A bond can be broken either by heterolytic bond cleavage to form ions or homolytic bond cleavage to yield radicals. A fishhook arrow is used to represent the motion of a single electron in homolytic bond cleavage. There are two main sources from which radicals can be formed:
Radicals from spin-paired molecules:
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Radical Anti-Markovnikov Addition to Alkenes: Overview01:25

Radical Anti-Markovnikov Addition to Alkenes: Overview

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The addition of hydrogen bromide to alkenes in the presence of hydroperoxides or peroxides proceeds via an anti-Markovnikov pathway and yields alkyl bromides.
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Relation between Mathematical Equations and Block Diagrams01:20

Relation between Mathematical Equations and Block Diagrams

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In a spring-mass-damper system, the second-order differential equation describes the dynamic behavior of the system. When transformed into the Laplace domain under zero initial conditions, this equation can be effectively analyzed and manipulated. The transformation into the Laplace domain converts differential equations into algebraic equations, simplifying the process of isolating the output.
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Related Experiment Video

Updated: Nov 27, 2025

Transcranial Direct Current Stimulation tDCS of Wernicke's and Broca's Areas in Studies of Language Learning and Word Acquisition
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Transcranial Direct Current Stimulation tDCS of Wernicke's and Broca's Areas in Studies of Language Learning and Word Acquisition

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Dynamic Rounds Chaotic Block Cipher Based on Keyword Abstract Extraction.

Juan Wang1,2, Qun Ding1

  • 1Electronic Engineering College, Heilongjiang University, Harbin 150001, China.

Entropy (Basel, Switzerland)
|December 3, 2020
PubMed
Summary
This summary is machine-generated.

This study introduces a dynamic rounds chaotic block cipher, enhancing security and efficiency. It adapts encryption rounds for important data, improving anti-attack capabilities while reducing computational load.

Keywords:
abstract extractionblock cipherchaosdynamic encrypted rounds

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Related Experiment Videos

Last Updated: Nov 27, 2025

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Area of Science:

  • Computer Science
  • Cryptography
  • Information Security

Background:

  • Traditional block ciphers face challenges in balancing security and efficiency.
  • Dynamic encryption rounds are needed for adaptive data protection.

Purpose of the Study:

  • To design a dynamic rounds chaotic block cipher.
  • To enhance information security and cryptographic algorithm efficiency.

Main Methods:

  • Combining chaotic theory with Feistel structure block cipher.
  • Utilizing chaotic sequence randomness and S-box nonlinearity.
  • Dynamically generating encryption rounds based on information importance.

Main Results:

  • The dynamic rounds chaotic block cipher offers adaptive encryption levels.
  • Achieved enhanced anti-attack capabilities and reduced encryption rounds.
  • Demonstrated superior performance compared to traditional and lightweight ciphers through NIST tests.

Conclusions:

  • The proposed cipher guarantees secure information transmission.
  • The dynamic rounds approach contributes to lightweight cryptographic algorithms.
  • This method effectively balances security and efficiency in data encryption.