Question

1. (1 point) Consider AES with 128-bit block length and 128-bit key length. What is the output of the first round of AES if the plaintext consists of 128 ones, and the first subkey also consists of 128 ones? Hint for the MixColumn layer calculations: $01 \cdot 63 = 01100011$ $02 \cdot 63 = 11000110$ $03 \cdot 63 = 10100101$ Note: The addition in the MixColumn layer calculations is the xor operation.

Name: 1 1 point consider aes with 128 bit block length and 128 bit key length what is the output of the first round of aes if the plaintext consists of 128 ones and the first subkey also consists 57932
Uploaded: 2023-10-02T02:09:36-08:00
Duration: 1 min 23 s
Channel: Akash M
Description: 1 1 point consider aes with 128 bit block length and 128 bit key length what is the output of the first round of aes if the plaintext consists of 128 ones and the first subkey also consists 57932

          1. (1 point) Consider AES with 128-bit block length and 128-bit key length.
What is the output of the first round of AES if the plaintext consists of 128 ones, and the first subkey
also consists of 128 ones?
Hint for the MixColumn layer calculations:
$01 \cdot 63 = 01100011$
$02 \cdot 63 = 11000110$
$03 \cdot 63 = 10100101$
Note: The addition in the MixColumn layer calculations is the xor operation.

1 1 point consider aes with 128 bit block length and 128 bit key length what is the output of the first round of aes if the plaintext consists of 128 ones and the first subkey also consists 57932

Added by Ignacio S.

Computer Science and Information Technology

Trishna Knowledge Systems 2018 Edition

Instant Answer

Solved by Expert Akash M

10/02/2023

Step 1

Since the plaintext and the first subkey both consist of 128 ones, the AddRoundKey operation will result in all zeros ($1 \oplus 1 = 0$). Show more…

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1. (1 point) Consider AES with 128-bit block length and 128-bit key length. What is the output of the first round of AES if the plaintext consists of 128 ones, and the first subkey also consists of 128 ones? Hint for the MixColumn layer calculations: $01 \cdot 63 = 01100011$ $02 \cdot 63 = 11000110$ $03 \cdot 63 = 10100101$ Note: The addition in the MixColumn layer calculations is the xor operation.