Question

MATH 1030 – Application Assignment 3 Cryptography Due: Thursday, June 4, 2020 at 11:59pm Atlantic time (submit through Brightspace) You must show your work for full marks. The goal of this assignment is to use our knowledge of linear algebra to do cryptography. We will encrypt a plaintext using a cipher where the resulting ciphertext should not be legible unless you know the key. The table below shows how we will encode the 26 letters of the alphabet to pairs of numbers over 25: 1 B G 2 C 0 1 0 A F L Q V H N 3 4 D E I/ JK O P T U Y Z 2 3 M R W S X 4 For example, here is the encoding the letters in the word "class": C = (0,2) L = (2,0) A = (0,0) S=(3,2) S=(3,2). We will write this as the sequence of numbers: 0,2,2,0,0,0,3,2,3, 2. Note: I and J have been given the same value since J is a relatively uncommon letter in English. For this worksheet, J won't be used for any of the plaintexts we encrypt. If you need to use J then J = I = (1,3). 1. Use the above to (a) write each group member's first name as a sequence of numbers. (b) find the word corresponding to 0,3, 0, 4, 0, 2, 3, 1, 4, 3, 2, 4, 3,3 .

Need help with number 3 the last one

Need help with number 3

I have already given the whole question

Answer 1

. AdjA= 7 T -2 IN IT 16 wl sil -1 -1 = 4 (mod 5 - 2 = 3 (mod 5 -3= 2 (mod 5 > زفة أي أم el ol sl o Adj Therefore, we have Ab dellA) (8 (det A) Adja C-T) SI WIN1 Jlold olslvl ld im IJ [Ca] 1) 2 4 _^ = AV In in 15 is old In 510