What the answer of ep1

https://Ims.ksu.edu.sa/bbcswebdav/pid-1144012-dt-content-rid-4933408 1/courses/EE 468 43565 1 35 EP1: For each of the ECB, CBC, and CTR modes of encryptions answer the following: Identify which decrypted plaintext block will be corrupted if there is an error in the fourth block of the transmitted ciphertext. a. b. Assume the ciphertext has N blocks, and there was a bit error in the source version of the third plaintext block. Through how many ciphertext blocks will this error propagate? EP2: Assume a block cipher achieving the avalanche effect is used. Does this guarantee that the encryption algorithm has the same effect? Explain your answer (if yes, prove it; if no, give a counter example)