Eccouncil 112-51 Exam - Topic 4 Question 19 Discussion

Actual exam question for Eccouncil's 112-51 exam

Question #: 19
Topic #: 4

Which of the following algorithms is an iterated block cipher that works by repeating the defined steps multiple times and has a 128-bit block size, having key sizes of 128, 192, and 256 bits?

ADSA

BMD5

CSHA

DAES

Show Suggested Answer

Suggested Answer: D

AES (Advanced Encryption Standard) is an iterated block cipher that works by repeating the defined steps multiple times and has a 128-bit block size, having key sizes of 128, 192, and 256 bits. AES is a symmetric-key algorithm that encrypts and decrypts data using the same secret key. AES operates on a 4x4 matrix of bytes called the state, which undergoes 10, 12, or 14 rounds of transformation depending on the key size. Each round consists of four steps: sub-bytes, shift-rows, mix-columns, and add-round-key. AES is widely used for securing data in various applications and platforms, such as web browsers, VPNs, wireless networks, and smart grids. AES is the algorithm that matches the description given in the question. Reference:

AES - Week 4: Cryptography Techniques

Advanced Encryption Standard (AES) - NIST

AES Encryption and Decryption Online Tool - Code Beautify

by Fairy at Sep 13, 2024, 03:55 AM

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Kenda

3 months ago

AES is solid, but I still have my doubts about its security in the long run.

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Lillian

3 months ago

I thought MD5 was a hashing algorithm, not a cipher?

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Carma

3 months ago

Wait, isn't DSA a digital signature algorithm?

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Berry

4 months ago

Agreed, AES has those key sizes and block size!

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Marlon

4 months ago

Definitely AES, it's the standard for block ciphers!

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Justine

4 months ago

I keep mixing up MD5 and SHA, but I don't think either of them are block ciphers like AES.

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Laurene

4 months ago

I practiced a similar question, and I believe AES is the only one that fits the description given the block size and key lengths.

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Emilio

4 months ago

I'm not entirely sure, but I feel like DSA is more about digital signatures, not block ciphers.

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Georgiana

5 months ago

I think the answer is AES because I remember it being an iterated block cipher with those key sizes.

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Annamaria

5 months ago

AES seems like the most likely answer based on the details provided. I'll mark that down unless I can think of a reason why another option might fit better. Gotta move quickly on these exam questions!

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Laila

5 months ago

I'm not totally sure about this one. I know AES is a common block cipher, but I'm not positive it's the only one that matches all the criteria here. I'll have to think it through carefully.

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Tracey

5 months ago

Okay, I've got this. The algorithm with a 128-bit block size and variable key sizes of 128, 192, and 256 bits is AES. I'm confident that's the right answer.

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Ronna

5 months ago

This one looks tricky, but I think I can figure it out. Let me think through the key details - it's an iterated block cipher with a 128-bit block size and variable key sizes. That narrows it down a bit.

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Tijuana

5 months ago

Hmm, I'm a little confused on the difference between some of these algorithms. I'll need to review my notes on block ciphers and their properties to make sure I understand which one fits the description.

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Jesus

1 year ago

I'll go with AES. It's the industry standard for a reason, right? Can't imagine the exam makers would try to trick us on this one.

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Nobuko

1 year ago

AES is the best option here. It's a reliable choice for encryption.

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Vernice

1 year ago

I think AES is the correct choice too. It's a strong algorithm.

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Nathan

1 year ago

I agree, AES is known for its security and efficiency.

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Long

1 year ago

AES is definitely the way to go. It's widely used and trusted.

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Lorrine

1 year ago

D. AES. Hands down. The others just don't match up to the spec. Unless, of course, this is some kind of trick question...?

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Beatriz

1 year ago

Hah, easy peasy. D, AES. Anything else would just be silly. Though I hear MD5 is great for securing my passwords...

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Cristen

1 year ago

I'm gonna have to go with D. AES is the only one that fits the description given in the question.

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Katina

1 year ago

AES, of course! The key sizes and block size are a dead giveaway. Can't go wrong with good old AES.

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Frank

1 year ago

AES is known for its strong security features with key sizes and block size like that.

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Katlyn

1 year ago

AES is definitely the way to go for secure encryption.

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Julene

1 year ago

I agree, AES is a solid choice with those key sizes and block size.

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Sherman

1 year ago

AES, for sure. It's the algorithm that keeps my grandma's cookie recipes safe from prying eyes.

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Layla

1 year ago

Easy, it's D. AES. I can never remember all those other cryptographic acronyms, but AES is the one I know.

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Vannessa

1 year ago

Hmm, I think it's D. AES, the Advanced Encryption Standard. It's the go-to algorithm these days.

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Gail

1 year ago

Definitely, AES is the way to go for encryption.

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Trevor

1 year ago

Yeah, AES is widely used for its security and efficiency.

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Shannan

1 year ago

I think it's D. AES, the Advanced Encryption Standard.

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Zachary

1 year ago

I'm not sure, but AES does seem like the most likely choice.

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Tora

1 year ago

Definitely AES. I've used it in my projects and it's rock solid.

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King

1 year ago

AES with its 128-bit block size is very reliable.

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Shawn

1 year ago

I've heard AES is the best option for encryption.

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Sue

1 year ago

I agree, AES is very secure.

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Dottie

1 year ago

AES is definitely the right choice.

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Mel

1 year ago

I've heard great things about AES, it's a popular choice for encryption.

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Lynsey

1 year ago

AES is definitely the way to go for encryption.

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Angelyn

1 year ago

I agree, AES is very reliable and secure.

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Clorinda

1 year ago

I agree with Denna, AES fits the description.

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Denna

1 year ago

I think the answer is D) AES.

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