Problem:
Question 1: What RC4 key value will leave S unchanged during initialization? That is, after the initial permutation of S, the entries of S will be equal to the values from 0 through 255 in ascending order.
Please explain what RC4 key value will leave S unchanged during initialization.
Question 2: With the ECB mode, if there is an error in a block of the transmitted cipher text, only the corresporrding plaintext block is affected. However, in the CBC mode, this error propagates.
Please describe the ECB mode.