Which of the following are valid key sizes for AES (choose three)?

Which of the following are valid key sizes for AES (choose three)?
A . 192
B. 56
C. 256
D. 128
E. 512
F. 64

View Answer

Answer: A,C,D

Explanation:

Correct answers: 128, 192, 256 https://en.wikipedia.org/wiki/Advanced_Encryption_Standard

The Advanced Encryption Standard (AES), also known by its original name Rijndael, is a specification for the encryption of electronic data established by the U.S. National Institute of Standards and Technology (NIST) in 200 1.

AES is a subset of the Rijndael block cipher developed by two Belgian cryptographers, Vincent Rijmen and Joan Daemen, who submitted a proposal to NIST during the AES selection process. Rijndael is a family of ciphers with different key and block sizes. For AES, NIST selected three members of the Rijndael family, each with a block size of 128 bits, but three different key lengths: 128, 192 and 256 bits.