Eccouncil 212-81 Exam - Topic 3 Question 37 Discussion

Actual exam question for Eccouncil's 212-81 exam

Question #: 37
Topic #: 3

Changes to one character in the plain text affect multiple characters in the cipher text, unlike in historical algorithms where each plain text character only affect one cipher text character.

ASubstitution

BAvalanche

CConfusion

DDiffusion

Show Suggested Answer

Suggested Answer: D

Vigenre

https://en.wikipedia.org/wiki/Vigen%C3%A8re_cipher

The Vigenre cipher is a method of encrypting alphabetic text by using a series of interwoven Caesar ciphers, based on the letters of a keyword. It employs a form of polyalphabetic substitution.

First described by Giovan Battista Bellaso in 1553, the cipher is easy to understand and implement, but it resisted all attempts to break it until 1863, three centuries later. This earned it the description le chiffre indchiffrable (French for 'the indecipherable cipher'). Many people have tried to implement encryption schemes that are essentially Vigenre ciphers. In 1863, Friedrich Kasiski was the first to publish a general method of deciphering Vigenre ciphers.

by Val at Jul 09, 2024, 09:03 PM

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Candra

3 months ago

Interesting how modern ciphers differ from the old ones!

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Becky

3 months ago

Wait, are we sure about that? Seems off.

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Myra

3 months ago

Totally agree, diffusion is key here.

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Shizue

4 months ago

I thought it was confusion?

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Janna

4 months ago

That's definitely diffusion at work!

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Rhea

4 months ago

I feel like substitution is too simple for this scenario, but I'm not confident about the difference between diffusion and avalanche.

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Trina

4 months ago

This sounds familiar; I practiced a question about confusion and diffusion, but I can't recall which one applies here.

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Yuki

4 months ago

I'm not entirely sure, but I remember something about the avalanche effect being important in modern ciphers.

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Tequila

5 months ago

I think this might be related to diffusion, where a change in one character spreads out to affect others in the cipher text.

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Junita

5 months ago

This is a tricky one. The wording about "historical algorithms" is throwing me off a bit. I'll have to review my notes on block cipher modes and how they differ from older substitution-based ciphers. Gotta make sure I don't overthink this.

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Micah

5 months ago

Okay, I think I've got it. The fact that changes to the plaintext affect multiple ciphertext characters means the algorithm is using some kind of diffusion technique, rather than just simple substitution. I'm pretty confident that's the right answer.

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Kristian

5 months ago

Hmm, I'm a bit unsure about this one. The question mentions "unlike in historical algorithms", so I'm not sure if the answer is really that simple. I'll have to think this through carefully.

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Oliva

5 months ago

This one seems straightforward - the key concept here is that changes to the plaintext affect multiple characters in the ciphertext, which points to the concept of diffusion.

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Catarina

5 months ago

This seems like a tricky question about optical networking technology. I'll need to think carefully about the different modulation and multiplexing techniques used in high-speed fiber optic communications.

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Leila

5 months ago

I think this question is about work center utilization, but I'm not totally sure if it could also be related to efficiency.

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Tamra

10 months ago

Looks like we've got a cryptography nerd in the house! I'll just guess and hope for the best.

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Emerson

8 months ago

C) Confusion

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Wilburn

8 months ago

B) Avalanche

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Gary

9 months ago

A) Substitution

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Laura

10 months ago

This is clearly about diffusion, not some historical algorithm. D is the way to go, folks.

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Jeffrey

8 months ago

D) Diffusion

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Rene

8 months ago

C) Confusion

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Tanesha

8 months ago

B) Avalanche

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Josephine

8 months ago

A) Substitution

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Dolores

10 months ago

Hmm, this is a tricky one. I'm leaning towards C - confusion seems to fit the description of the relationship between plaintext and ciphertext.

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Tina

9 months ago

I'm not sure, but I'll choose A - substitution for now.

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Germaine

9 months ago

I would go with D - diffusion, it seems to make more sense.

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Hyman

9 months ago

I think C - confusion is the right choice here.

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Mariann

10 months ago

Ah, the avalanche effect! That's gotta be B. Changes in the plaintext should ripple through the ciphertext.

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Annmarie

8 months ago

So, the avalanche effect is an important property in modern encryption algorithms.

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Lashandra

9 months ago

Exactly, it helps to ensure that even a small change in the plaintext will result in a completely different ciphertext.

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Sharmaine

9 months ago

I think it has to do with how small changes in the input can cause drastic changes in the output.

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Evette

10 months ago

Yes, you're right! The avalanche effect is a key concept in encryption.

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Mauricio

10 months ago

I'm not sure, but I think it could also be B) Avalanche because it describes the cascading effect of changes in the plain text.

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Valentine

10 months ago

I agree with Danica, because diffusion ensures that changes in plain text affect multiple characters in the cipher text.

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Danica

10 months ago

I think the answer is D) Diffusion.

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Nicolette

10 months ago

I'm not sure, but I think it could also be B) Avalanche, as it describes how changes in the input propagate through the output.

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Lilli

11 months ago

I agree with Lemuel, because diffusion ensures that changes in plain text affect multiple characters in the cipher text.

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Caprice

11 months ago

This sounds like the concept of diffusion in modern cryptography. I'll go with D.

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Kimbery

9 months ago

I think diffusion helps to make it harder for attackers to decipher the original message.

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Launa

9 months ago

That's why diffusion is crucial for ensuring the security of encrypted messages.

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Domitila

10 months ago

Yes, changes to one character in the plain text should affect multiple characters in the cipher text.

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Julieta

10 months ago

I agree, diffusion is an important concept in modern cryptography.

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Lemuel

11 months ago

I think the answer is D) Diffusion.

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