Chapter 6 - Cryptography

Question 1

 what modes of operation do errors propagate

Answer 1

cipher Blockchaing (CBC) wnd cipher feedback (CFB)

Question 2

What is non-repudiation

Answer 2

Provides undeniable proof that the sender of a message really authorised it

Question 3

What’s the difference between confusion and diffusion

Answer 3

Diffusion occurs when a change in the plane text results in multiple changes spread throughout the ciphertext
Confusion occurs when the relationship between the plane texting the key is so complicated that attack account merely continue alternating the plaintext and analysing this cipher