# 信息安全代写 | CUS 1185 Midterm Exam

本次美国代写主要为信息安全的限时测验

__High level description of activity____:__

In this exercise I would like you to simulate a real-life RSA encryption between a sender (S) and a recipient (R). You are provided the following information shown in here which is composed of a prime **p**, a prime **q**, a composite **N**=p*q, and a 3-character **plaintext** word which you can encrypt with RSA based on your own choice of encoding method.

Questions 1-5 cumulatively have 100 points. Questions 6a and 6b have 10 points extra credit opportunity each, assuming they’re 100% correctly answered. Hence the total grade you can earn in here is 120 out of 100 possible points.

__Detailed description of activity:__

{a=g1, b=g2, c=g3…z=g26} such that g1, g2, g3…g26 are the first 26 group elements of the Z_{N}^{*} group that you generated on step 4a.

So, for example if your plaintext word to be encrypted were to be ‘tar’ you would have to show me:

What the sender (S) sends to the recipient (R) for each of the group elements representing ‘t’ ‘a’ ‘r’. In other words, you would have to show me how the sender performs the encryption of those three elements representing the characters according to your chosen encoding.

b. How the recipient (R) recovers the received encrypted ciphertext in order to produce the group element corresponding to some letter according to your own chosen encoding.