6. Let m be a message consisting of L AES blocks (say L=100). Alice encrypts using CBC mode and transmits the resulting ciphertext to Bob. Due to a network error, ciphertext block number L/2 is corrupted during transmission. All other ciphertext blocks are transmitted and received correctly. Once Bob decrypts the received ciphertext, how many plaintext blocks will be corrupted?
6. Let m be a message consisting of L AES blocks (say L=100). Alice e…
May 1, 2023
numerade.com
Suppose bob uses the rsa cryptosystem with a very large modulus n for which the factorization cannot be found in a reasonable amount of time. suppose alice sends a message to bob by representing each alphabetic character as an integer between 0 and 25 (a s 0, . . . , z s 25), and then encrypting each number separately using rsa with large e and large n. is this method secure? if not, describe the most efficient attack against this encryption method.
Suppose bob uses the rsa cryptosystem with a very large mo…
Jun 4, 2022
numerade.com
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