Posted on Categories:Cryptography, 密码学, 数学代写

# 数学代写|密码学代写CRYPTOGRAPHY代考|CSE546 Shakespeare vs. Bacon

avatest™

avatest.org密码学Cryptography代写，免费提交作业要求， 满意后付款，成绩80\%以下全额退款，安全省心无顾虑。专业硕 博写手团队，所有订单可靠准时，保证 100% 原创。avatest.org™， 最高质量的密码学Cryptography作业代写，服务覆盖北美、欧洲、澳洲等 国家。 在代写价格方面，考虑到同学们的经济条件，在保障代写质量的前提下，我们为客户提供最合理的价格。 由于统计Statistics作业种类很多，同时其中的大部分作业在字数上都没有具体要求，因此密码学Cryptography作业代写的价格不固定。通常在经济学专家查看完作业要求之后会给出报价。作业难度和截止日期对价格也有很大的影响。

avatest.org™ 为您的留学生涯保驾护航 在网课代修方面已经树立了自己的口碑, 保证靠谱, 高质且原创的网课代写服务。我们的专家在密码学Cryptography代写方面经验极为丰富，各种密码学Cryptography相关的作业也就用不着 说。

## 数学代写|密码学代写CRYPTOGRAPHY代考|Shakespeare vs. Bacon

In Section $1.2$ we examined the skytale, an ancient Greek device to perform transposition encryption. Another device known as the Cardano grille may also be used for this purpose. Before detailing its use, we take a brief look at the life of Girolamo Cardano (Figure 3.4).

Cardano is best remembered for being the first to publish (in Ars Magna, 1545) the solution to the cubic equation. However, a controversy ensued immediately, as he had obtained the formula from Tartaglia, after much harassment and a promise to keep it secret. Cardano is also credited with authoring the first book on probability ${ }^{18}$ (Liber de Ludo Aleae) and making the first explicit use of complex numbers in a calculation (Ars Magna again). On the personal side, things didn’t go as well. In 1560 , Cardano’s son Giambattista, was jailed and executed following his conviction for killing his wife. Another son is alleged to have had his ears cut off by Cardano for some offense!
Cardano himself was jailed in 1570 . He was charged with heresy for casting the horoscope of Jesus Christ and writing a book that praised Nero. ${ }^{19}$ His punishment was much less severe than what others faced in the hands of the Inquisition; he spent 77 days in prison and more under house arrest. Although he was banned from publishing (and even writing!) for a time, he authored 100 works over the course of his life, some of which consisted of more than one “book.”

Cardano had been plagued by health problems throughout his life. His list includes catarrh, indigestion, congenital heart palpitations, hemorrhoids, gout, rupture, bladder trouble, insomnia, plague, carbuncles, tertian fever, colic, and poor circulation, plus various other ailments. One is tempted to add hypochondria. He seemed to delight in recounting his troubles: “My struggles, my worries, my bitter grief, my errors, my insomnia, intestinal troubles, asthma, skin ailments and even phtheiriasis, the weak ways of my grandson, the sins of my own son… not to mention my daughter’s barrenness, the drawn out struggle with the College of Physicians, the constant intrigues, the slanders, poor health, no true friends” and “so many plots against me, so many tricks to trip me up, the thieving of my maids, drunken coachmen, the whole dishonest, cowardly, traitorous, arrogant crew that it has been my misfortune to deal with.” 20

## 数学代写|密码学代写 CRYPTOGRAPHY代考|Thomas Jefferson: President, Cryptographer

The cryptographic work of Thomas Jefferson (Figure 4.4) includes a cipher he (re)created that was previously described by Sir Francis Bacon. This system was reinvented repeatedly and was still in use up to the middle of World War II. But, before we look at it, some of Jefferson’s other cryptographic work is detailed.

For the Lewis and Clark Expedition, Jefferson instructed Lewis to “communicate to us, seasonable at intervals, a copy of your journal, notes and observations, of every kind, putting into cipher whatever might do injury if betrayed.” Jefferson had the Vigenère cipher in mind, but it was never used.7 It seems reasonable to assume that Jefferson chose this system because he was aware of weaknesses in simpler systems.

Some knowledge of cryptanalysis is also demonstrated by a nomenclator Jefferson created in 1785. Part of the code portion of this nomenclator is reproduced in Figure 4.5.

Notice that Jefferson didn’t number the words consecutively. He was aware of attacks on codes constructed in that manner (see Section 1.16) and made sure his own couldn’t be defeated by them. We now come to his most famous discovery (Figure 4.6). The older wheel cipher pictured on the right is described below. ${ }^{8}$
This enciphering and deciphering device was acquired from West Virginia by NSA in the early 1980s. It was first thought to have been a model of the “Jefferson cipher wheel,” so called because Thomas Jefferson described a similar device in his writings. We believe it to be the oldest extant device in the world, but the connection with Jefferson is unproven. Such devices are known to have been described by writers as early as Francis Bacon in 1605 and may have been fairly common among the arcane “black chambers” of European governments. This cipher wheel was evidently for use with the French language, which was the world’s diplomatic language up through World War I. How it came to be in West Virginia is unknown.

## MATLAB代写

MATLAB 是一种用于技术计算的高性能语言。它将计算、可视化和编程集成在一个易于使用的环境中，其中问题和解决方案以熟悉的数学符号表示。典型用途包括：数学和计算算法开发建模、仿真和原型制作数据分析、探索和可视化科学和工程图形应用程序开发，包括图形用户界面构建MATLAB 是一个交互式系统，其基本数据元素是一个不需要维度的数组。这使您可以解决许多技术计算问题，尤其是那些具有矩阵和向量公式的问题，而只需用 C 或 Fortran 等标量非交互式语言编写程序所需的时间的一小部分。MATLAB 名称代表矩阵实验室。MATLAB 最初的编写目的是提供对由 LINPACK 和 EISPACK 项目开发的矩阵软件的轻松访问，这两个项目共同代表了矩阵计算软件的最新技术。MATLAB 经过多年的发展，得到了许多用户的投入。在大学环境中，它是数学、工程和科学入门和高级课程的标准教学工具。在工业领域，MATLAB 是高效研究、开发和分析的首选工具。MATLAB 具有一系列称为工具箱的特定于应用程序的解决方案。对于大多数 MATLAB 用户来说非常重要，工具箱允许您学习应用专业技术。工具箱是 MATLAB 函数（M 文件）的综合集合，可扩展 MATLAB 环境以解决特定类别的问题。可用工具箱的领域包括信号处理、控制系统、神经网络、模糊逻辑、小波、仿真等。