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相关概念视频

Non-ohmic Devices00:51

Non-ohmic Devices

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In most substances, the current flow is proportional to the voltage applied to it. A simple relationship between the values of current, voltage, and resistance is known as Ohm's law. Nonohmic devices do not exhibit a linear relationship between voltage and current. One such device is the semiconducting circuit element known as a diode. A diode is a circuit device that allows current flow in only one direction.
Consider a simple circuit consisting of a battery, a diode, and a resistor. A...
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Self-Locking Screw01:16

Self-Locking Screw

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A square-threaded screw jack is a mechanical device widely used for lifting heavy loads or applying considerable force. One of the key features that can make a screw jack more effective and reliable is its self-locking capability.
A square-threaded screw jack carrying a load is considered self-locking if the screw retains its position even after the moment applied to it is removed.
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Semiconductors01:22

Semiconductors

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There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
576
Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

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Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short...
26
Vapor Pressure Lowering03:28

Vapor Pressure Lowering

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The equilibrium vapor pressure of a liquid is the pressure exerted by its gaseous phase when vaporization and condensation are occurring at equal rates:
 
Dissolving a nonvolatile substance in volatile liquid results in a lowering of the liquid’s vapor pressure. This phenomenon can be explained by considering the effect of added solute molecules on the liquid's vaporization and condensation processes. To vaporize, solvent molecules must be present at the surface of the solution....
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Ampere-Maxwell's Law: Problem-Solving01:17

Ampere-Maxwell's Law: Problem-Solving

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A parallel-plate capacitor with capacitance C, whose plates have area A and separation distance d, is connected to a resistor R and a battery of voltage V. The current starts to flow at t = 0. What is the displacement current between the capacitor plates at time t? From the properties of the capacitor, what is the corresponding real current?
To solve the problem, we can use the equations from the analysis of an RC circuit and Maxwell's version of Ampère's law.
For the first part of...
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相关实验视频

Updated: Jun 3, 2025

Data Communication Based on MQTT in a Polymer Extrusion Process
08:15

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DNA-PRESENT:一种改进的安全性和低延迟,轻量级的加密解决方案,用于物联网.

Maria Imdad1,2, Adnan Fazil1, Sofia Najwa Binti Ramli2

  • 1Department of Avionics Engineering, Air University, E-9, Islamabad 44000, Pakistan.

Sensors (Basel, Switzerland)
|January 8, 2025
PubMed
概括

这项研究介绍了DNA-PRESENT,这是物联网 (IoT) 的新型轻量级块密码. DNA-PRESENT通过提高密钥和纯文本敏感性来增强安全性,为物联网数据保护提供了安全性和性能之间的更好的权衡.

关键词:
在DNA密码学,DNA密码学.物联网 (IoT) 的物联网 (IoT) 的物联网.现在的区块密码.扩散性质是一种扩散性质.轻量级密码学 轻量级密码学绩效分析 绩效分析是指业绩分析的方法.安全分析安全分析.

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相关实验视频

Last Updated: Jun 3, 2025

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科学领域:

  • 密码学和网络安全
  • 物联网 (IoT) 安全 安全 物联网
  • 轻量级密码学 轻量级密码学

背景情况:

  • 物联网 (IoT) 面临着严重的安全威胁,原因是大量的数据交换和资源有限的设备.
  • 轻量级的加密算法对于提高物联网数据安全性而不会影响性能至关重要.
  • 虽然PRESENT区块密码是高效的,但由于其排列层中的静态位导致缓慢的混和扩散.

研究的目的:

  • 为了解决PRESENT区块密码的缓慢混和扩散特性.
  • 为物联网环境增强轻量级加密的安全性.
  • 通过整合脱氧核糖核酸 (DNA) 复制和转移辅助操作,开发一种新的区块密码,DNA-PRESENT.

主要方法:

  • 使用脱氧核糖核酸 (DNA) 复制原理和转移辅助操作修改 PRESENT 块密码.
  • 拟议的DNA-PRESENT区块密码的实施.
  • 进行全面的安全,成本和性能分析,以评估改进.

主要成果:

  • DNA-PRESENT实现了关键敏感度的73.57%,纯文本敏感度的33%.
  • 该算法保持了平均比特错误率 (BER) 为50.2%.
  • 吞吐量增加了176.47kb/s,延迟减少到17个循环/块,硬件效率保持在43.41kbps/KGE的高水平,执行时间减少了0.2333s.

结论:

  • DNA-PRESENT有效地克服了原来的PRESENT密码的混和扩散限制.
  • DNA-PRESENT的增强安全功能为其边际成本增加提供了有利的权衡.
  • 拟议的算法为在资源有限的物联网环境中保护数据提供了可行的解决方案.