Cryptography

5. (4x1 = 4 points) Mark all that apply. The following algorithms are modes of operation for block ciphers: a. 3DES, which uses padding, and AES, which doesn't use padding. b. CBC, which uses padding, and CTR, which doesn't use padding. c. PKCS, which uses padding, and NIST, which doesn't use padding. d. SHA-2, which uses padding, and SHA-3, which doesn't use padding