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Which two key and block sizes are valid for AES? (Choose two)
Suggested Answer: A
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28 comments · newest first
ME
Mel
11 months ago
Wait, are there really 64-bit options? That seems off.
EL
Elouise
11 months ago
128-bit block size is a must for AES!
RO
Rodolfo
11 months ago
I thought AES only had 128-bit keys.
JA
Jackie
11 months ago
Definitely! 192 and 256-bit keys are valid too.
OL
Olive
12 months ago
AES uses 128-bit block size, right?
LE
Leigha
12 months ago
I definitely recall that AES supports 128-bit block size, but I can't remember if the key lengths are 192 and 256 or something else.
NO
Noah
1 year ago
I feel uncertain about the block sizes; I thought AES had only one block size. Is it really 128 bits?
DO
Dong
1 year ago
I remember practicing a question like this, and I think the valid options are C and D.
GE
Gerald
1 year ago
I think AES uses a 128-bit block size, but I'm not sure about the key lengths. Was it 192 and 256 bits?
RO
Rosendo
1 year ago
I've got this! The valid AES key and block sizes are 128-bit and 256-bit, which correspond to options C and D. Easy peasy.
AN
Annelle
1 year ago
Okay, let me think this through step-by-step. AES supports 128-bit, 192-bit, and 256-bit key sizes, and 128-bit block size. So the valid options here are C and D.
SL
Slyvia
1 year ago
Hmm, I'm a bit unsure about this one. I know AES uses 128-bit blocks, but I can't remember the valid key sizes off the top of my head. I'll have to think this through carefully.
BE
Becky
1 year ago
I'm pretty sure the valid AES key and block sizes are 128-bit and 256-bit, so I'll go with options C and D.
EM
Emiko
1 year ago
Okay, I remember learning that a correlation of +1.0 means the two variables move perfectly together in the same direction. So a positive slope makes the most sense here. I'll select option A.
ER
Erasmo
1 year ago
This is a piece of cake! AES-128 and AES-256 are the two most commonly used versions, so C and D are the answers.
AL
Alease
1 year ago
Ha! 192-bit block size? What is this, the crypto version of the Jurassic Park movie? Clearly D is the only valid one here.
TR
Tricia
1 year ago
I was pretty sure that 64-bit block size is not valid for AES, so A and B are out. C and D look like the right choices to me.
SH
Shawana
1 year ago
Yes, AES supports 128-bit key and block sizes, so C and D are the valid choices.
KA
Karol
1 year ago
AES uses 128-bit block size and key size, so C and D are the correct options.
BE
Bette
1 year ago
I agree, C and D are the correct choices for AES key and block sizes.
SH
Sharika
1 year ago
I think you're right, A and B are definitely not valid for AES.
GW
Gwenn
1 year ago
C and D seem to be the correct options, as AES supports 128-bit block size with 192-bit and 256-bit key lengths.
GA
Gail
1 year ago
That's correct, C and D are the valid key and block sizes for AES.
BE
Bettyann
1 year ago
Yes, AES supports 128-bit block size with 192-bit and 256-bit key lengths.
RO
Rocco
1 year ago
I think you're right, C and D are the valid options for AES.
HU
Hubert
2 years ago
I'm not sure, but I think option C could also be valid.
MA
Magda
2 years ago
I agree with Abel, option D seems correct for AES.
AB
Abel
2 years ago
I think the valid sizes are 128-bit block and 256-bit key.