Which of the following is not a property of the Rijndael block cipher algorithm?

The correct answer is C. It operates on 64-bit plaintext blocks and uses a 128 bit key. All other properties above apply to the Rijndael algorithm, chosen as the AES standard to replace The AES algorithm is capable of using cryptographic keys of 128, 192, and 256 bits to encrypt and decrypt data in blocks of 128 bits. Rijndael was designed to handle additional…

Submitted by rania.sa· Apr 18, 2026Cryptography

Question

Options

AIt employs a round transformation that is comprised of three layers of distinct and invertible
BIt is suited for high speed chips with no area restrictions.
CIt operates on 64-bit plaintext blocks and uses a 128 bit key.
DIt could be used on a smart card.

How the community answered

(65 responses)

A
3% (2)
B
2% (1)
C
94% (61)
D
2% (1)

Explanation

All other properties above apply to the Rijndael algorithm, chosen as the AES standard to replace The AES algorithm is capable of using cryptographic keys of 128, 192, and 256 bits to encrypt and decrypt data in blocks of 128 bits. Rijndael was designed to handle additional block sizes and key lengths, however they are not adopted in the AES standard. IDEA cipher algorithm operates on 64-bit plaintext blocks and uses a 128 bit key.

Topics

#Rijndael#AES#Block Cipher#Cryptographic Algorithms

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