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相关概念视频

Block Diagram Reduction01:22

Block Diagram Reduction

520
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...
520
Norton Equivalent Circuits01:16

Norton Equivalent Circuits

731
Norton's theorem is a fundamental concept in the field of electrical engineering that allows for the simplification of complex AC circuits. The theorem states that any two-terminal linear network can be replaced with an equivalent circuit that consists of an impedance, which is parallel with a constant current source. Figure 1 shows the AC circuit portioned into two parts: Circuit A and Circuit B, while Figure 2 depicts the circuit obtained by replacing Circuit A by its Norton equivalent...
731
Network Function of a Circuit01:25

Network Function of a Circuit

625
Frequency response analysis in electrical circuits provides vital insights into a circuit's behavior as the frequency of the input signal changes. The transfer function, a mathematical tool, is instrumental in understanding this behavior. It defines the relationship between phasor output and input and comes in four types: voltage gain, current gain, transfer impedance, and transfer admittance. The critical components of the transfer function are the poles and zeros.
625
Norton's Theorem01:14

Norton's Theorem

1.4K
Norton's theorem is a fundamental principle stating that a linear two-terminal circuit can be substituted with an equivalent circuit, which comprises a current source (ⅠN) in parallel with a resistor (RN). Here, ⅠN represents the short-circuit current flowing through the terminals, and RN stands for the input or equivalent resistance at the terminals when all independent sources are deactivated. This implies that the circuit illustrated in Figure (a) can be exchanged with the one depicted...
1.4K
Linear time-invariant Systems01:23

Linear time-invariant Systems

863
A system is linear if it displays the characteristics of homogeneity and additivity, together termed the superposition property. This principle is fundamental in all linear systems. Linear time-invariant (LTI) systems include systems with linear elements and constant parameters.
The input-output behavior of an LTI system can be fully defined by its response to an impulsive excitation at its input. Once this impulse response is known, the system's reaction to any other input can be...
863
Relation between Mathematical Equations and Block Diagrams01:20

Relation between Mathematical Equations and Block Diagrams

2.9K
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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相关实验视频

Updated: Jan 13, 2026

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
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Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit

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NFBC:一个高效的基于FPGA的NFSR导向的轻量级块密码,适合嵌入式系统.

Runa Chatterjee1, Rajdeep Chakraborty2

  • 1Department of Computer Science and Engineering, Netaji Subhash Engineering College, Kolkata, West Bengal, 700152, India. runaseth2006@gmail.com.

Scientific reports
|January 6, 2026
PubMed
概括

本研究介绍了NFSR-Based Block Cipher (NFBC),这是一个新的轻量级认证加密方案,专为受限制的环境而设计. NFBC提供了强大的安全性和高效率,优于现有的轻量级加密候选人.

相关实验视频

Last Updated: Jan 13, 2026

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
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Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit

Published on: September 8, 2023

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科学领域:

  • 密码学 密码学 密码学 密码学
  • 计算机科学 计算机科学
  • 信息安全 信息安全

背景情况:

  • 轻量级加密对于资源有限的环境至关重要.
  • 现有的解决方案往往面临着安全性和效率之间的权衡.
  • 美国国家标准与技术研究所 (NIST) 正在开展针对轻量级加密技术标准化的举措.

研究的目的:

  • 引入和评估基于NFSR的区块加密 (NFBC),这是一个新的轻量级认证加密与相关数据 (NAEAD) 方案.
  • 证明NFBC适用于需要高安全性和高效率的受限制环境.
  • 为物联网 (IoT) 和嵌入式系统提供实用和安全的加密解决方案.

主要方法:

  • 使用非线性反转移寄存器 (NFSR),动态混沌 S 框和组转换 (GRP) 机制的 NFBC 设计.
  • 严格的安全分析,包括NIST统计测试套件 (STS),雪崩效应,比特独立标准 (BIC),非线性,差异和线性加密分析.
  • 使用分支数计算进行可证明的安全分析,用于理论上的担保.
  • 在Xilinx Artix-7上实现FPGA,用于性能和硬件开销评估.
  • 估计侧通道和故障攻击阻力对抗措施的开销.

主要成果:

  • NFBC成功通过了所有15个NIST STS测试.
  • 实现了近乎理想的雪崩和BIC属性,在200个S框实例中具有很高的非线性.
  • 对具有低差异和线性概率的经典攻击表现出强烈的抵抗力.
  • 与NIST Round-2和CAESAR候选人相比,FPGA的实施显示出优越的每个区域的吞吐量.
  • 掩盖和故障检测的可行开销表明对侧通道和故障攻击的抵抗力.

结论:

  • NFBC是一种安全且高效的轻量级加密解决方案.
  • 该设计符合NIST对数据,密钥和非密码大小的要求.
  • NFBC提供了一个实用和可部署的选项来保护受限制的设备.
  • NFSR,混乱的S框和GRP的组合提供了一个强大的安全效率平衡.