Eccouncil Exam 212-81 Topic 3 Question 37 Discussion

Actual exam question for Eccouncil's 212-81 exam

Question #: 37
Topic #: 3

You are studying classic ciphers. You have been examining the difference between single substitution and multi-substitution. Which one of the following is an example of a multi-alphabet cipher?

ARot13

BCaesar

CAtbash

DVigenre

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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Tamekia

4 months ago

Ah, the age-old question of single vs. multi-alphabet ciphers. I'm feeling lucky, so I'm going to go with Vigenère. What could possibly go wrong?

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Tamar

3 months ago

Rot13, Caesar, and Atbash are single substitution ciphers.

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Eugene

4 months ago

Yeah, Vigenère uses multiple alphabets for encryption.

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Ira

4 months ago

I think Vigenère is a multi-alphabet cipher.

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Nan

4 months ago

Vigenère, definitely. Encrypting messages with a keyword? That's some real spy stuff right there. I feel like James Bond just thinking about it.

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Verlene

5 months ago

Hmm, I'm torn between Rot13 and Vigenère. Decisions, decisions. Maybe I should just roll a dice to pick the answer?

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Louisa

3 months ago

Go with Vigenère for multi-substitution!

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Eric

3 months ago

Rot13 is a single substitution cipher.

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Nicolette

3 months ago

Yeah, Vigenère uses multiple cipher alphabets.

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Salome

4 months ago

I think Vigenère is a multi-alphabet cipher.

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Thurman

5 months ago

Haha, Vigenère? Really? That's like the most complex cipher ever. I'm going with Atbash, it's a classic and much simpler to remember.

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Mozell

3 months ago

True, Vigenère is a multi-alphabet cipher that uses a keyword to encrypt messages. It's definitely more advanced than Atbash.

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Fletcher

4 months ago

I agree, Vigenère is known for its complexity and strength in encryption.

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Margot

4 months ago

Atbash is definitely simpler to remember, but Vigenère is more complex and secure.

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Sol

4 months ago

I think I'll stick with Atbash for now, it's easier to use.

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Raul

4 months ago

I agree, Vigenère is much more complex and harder to crack.

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Gilbert

4 months ago

Atbash is definitely simpler, but Vigenère is more secure.

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Casie

5 months ago

I believe Rot13 is actually a single substitution cipher, so the correct answer is D) Vigenre.

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Matthew

5 months ago

I'm not sure, but I think Rot13 is also a multi-alphabet cipher.

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Bok

5 months ago

I agree with Viola, Vigenre uses multiple alphabets for encryption.

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Mozelle

5 months ago

Oh, this is an easy one! Multi-alphabet ciphers are so much more fun than those boring single substitution ones. Vigenère is clearly the answer here.

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Naomi

4 months ago

Rot13 and Atbash are too basic compared to Vigenère.

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Corazon

4 months ago

Vigenère adds an extra layer of security with its multi-alphabet approach.

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Kristeen

4 months ago

It's definitely more complex than a simple Caesar cipher.

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Kenneth

5 months ago

I agree, Vigenère uses multiple alphabets to encrypt the message.

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Viola

5 months ago

I think the answer is D) Vigenre.

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