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Phase Contrast and Differential Interference Contrast Microscopy

Phase Contrast and Differential Interference Contrast Microscopy

Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...

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Updated: Sep 9, 2025

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

一个轻量级的多轮混扩散加密系统,用于使用修改后的5D混乱系统来保护图像.

T Anujaa¹, Afra Fathima Thajudeen Ali Ahamed¹, Vedika Baranwal¹

¹School of Electronics Engineering, Vellore Institute of Technology (VIT), Vellore, 632 014, India.

Scientific reports

|August 30, 2025

概括

此摘要是机器生成的。

这项研究引入了一种新的图像加密算法,使用修改的5D混乱地图和SHA-512散列. 该系统增强了数字图像保护,以确保高风险环境中的安全通信.

关键词:

混乱地图混-扩散数字安全图像的加密多媒体保护在SHA-512中

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科学领域:

密码学
信息安全
应用数学

背景情况:

现代通信系统面临越来越多的机密信息传输威胁.
开发强大的加密方法对于在数字环境中保护敏感数据至关重要.

研究的目的:

提出一种新的图像加密算法,使用修改的5D混乱地图和SHA-512散列.
提高数字图像加密的安全性和随机性,用于高风险的应用.

主要方法:

一个修改后的5D混乱地图被开发出来,并使用分叉图和莱普诺夫指数分析了它的混乱属性.
设计了一种新的图像加密算法,包含SHA-512哈希和混扩散架构.
使用国家标准和技术研究所 (NIST) 测试验证生成的混乱序列的随机性.

主要成果:

经过修改的5D混乱地图显示显著的随机性,通过NIST测试进行验证.
该加密算法实现了高安全性指标:NPCR为99.6069%,UACI为33.4284%.
高值 (7.99442) 表示对统计攻击有很强的抵抗力.

结论:

拟议的混乱加密系统为数字图像保护提供了先进的安全功能.
该算法适用于需要高级数据安全性的多媒体,医疗和军事应用.
这项研究突显了混乱系统在高风险通信场景中保证信息的有效性.