Question $5$: $(6$ Marks$)$CO$2$

Imagine you want to send a secret word to one of your friends. The secret

message will consist of the last four letters of your name. For example, if your name is "John Doe,"$($Rabeya Bosri$)$ the last four letters would be 'ndoe'. You are provided with two prime numbers, $5$ and $17.$ Your task is to generate a

public and private key using the RSA algorithm. You need to clearly show the step$-$by$-$step process of generating the keys. Once the keys are generated, demonstrate how the ASCII values of your secret message can be encrypted using the encryption key to create the ciphertext. Then,

show how the ciphertext can be decrypted using the decryption key to retrieve the original message $($plaintext$).$