1. Encrypt the message "good luck for your assignment" (Ignore the space between the words). Also decrypt the encrypted message to get the original plaintext. Use your last name as the key and apply...

Course Title: Computer and Cyber Security

I need this questions answer as soon as possible.

Question:

• Encrypt the message “good luck for your assignment” (Ignore the space between the words). Also decrypt the encrypted message to get the original plaintext.

i. Use your last name as the key and apply Vigenère cipher.
(My last name is
"Islam"
as the key)

ii. Consider k1=11, and the last digit of your ID as k2. Apply Affine cipher.

Extracted text: 1. Encrypt the message "good luck for your assignment" (Ignore the space between the words). Also decrypt the encrypted message to get the original plaintext. Use your last name as the key and apply Vigenère cipher. (For example: Shakib Al Hasan will use "hasan" as the key) ii. Consider k1=11, and the last digit of your ID as k2. Apply Affine cipher. i.