Problems:

What are the differences between stream cipher and block cipher.

Define the following terminologies:

a$)$ Hash function

b$)$ Plaintext and ciphertext

c$)$ Brute$-$force attack

Generate your own Monoalphabetic Cipher and give an example on how to use it to encrypt and decrypt a message.

Describe in details the encryption and decryption of triple DES.

For each of the following assets, assign a low, moderate, or high impact level for the loss of confidentiality, availability, and integrity, respectively. Justify your answer.

a$)$ A financial organization managing routine administrative information $($not privacy$-$related information$).$

b$)$ A hospital managing the medical records of its patients.