GIAC GISF Exam - Topic 7 Question 56 Discussion

Actual exam question for GIAC's GISF exam

Question #: 56
Topic #: 7

Which of the following types of cipher encrypts alphabetic text by using a series of differentCaesar ciphers based on the letters of a keyword?

AVigen re cipher

BBlock cipher

CStream cipher

DTransposition cipher

Show Suggested Answer

Suggested Answer: C

by Dallas at Sep 10, 2024, 02:29 AM

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Vilma

8 months ago

Vigenère is classic, can't believe some people mix it up!

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Chau

9 months ago

I thought it was a transposition cipher at first.

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Arlene

9 months ago

Wait, are we sure it's not a block cipher?

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Dierdre

9 months ago

Totally agree, A is the right answer!

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Dustin

9 months ago

It's definitely the Vigenère cipher!

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Glendora

9 months ago

I recall a question similar to this in our last review session, and I think it was about the Vigenère cipher too. It just fits the description!

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Virgilio

10 months ago

I’m a bit confused; I thought the Vigenère was more about polyalphabetic substitution. Could it be something else?

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Refugia

10 months ago

I remember practicing with different ciphers, and the Vigenère was definitely one of them. It feels like the right choice here.

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Glendora

10 months ago

I think the answer might be the Vigenère cipher since it uses a keyword to shift letters, but I'm not completely sure.

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Domitila

10 months ago

Transposition ciphers rearrange the order of the letters, so that doesn't seem right for this description. I'm leaning towards Vigenère.

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Jill

10 months ago

The keyword aspect makes me think Vigenère as well. I'll focus on understanding how that cipher works in more detail.

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Joye

10 months ago

Hmm, I'm a bit confused on the difference between block ciphers and stream ciphers. I'll have to review those concepts again.

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Francine

10 months ago

I'm pretty sure this is a Vigenère cipher, since it mentions using a keyword to apply a series of Caesar ciphers.

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Haley

10 months ago

Social engineering, definitely. That's the technique that involves manipulating people to get information, right?

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Catrice

10 months ago

This kind of question pops up in practice tests, and I feel like I remember most sources saying it points to the screen, not the keyboard.

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Arlene

1 year ago

Stream ciphers? What is this, a liquid encryption party? The Vigenère cipher is the way to go, no doubt about it.

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Gerald

1 year ago

Stream ciphers may be fast, but Vigenère cipher offers a unique way to encrypt messages.

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Rolf

1 year ago

Block ciphers and transposition ciphers are also popular methods of encryption.

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Fatima

1 year ago

Transposition ciphers can be tricky to decrypt, but Vigenère cipher is more versatile.

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Deeanna

1 year ago

Block ciphers are also quite secure, but Vigenère cipher has its own charm.

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Bette

1 year ago

Stream ciphers are actually quite different, they encrypt data bit by bit instead of by blocks.

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Nicholle

1 year ago

I agree, the Vigenère cipher is a classic and effective encryption method.

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Elouise

1 year ago

I agree, the Vigenère cipher is a classic and effective encryption method.

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Mila

1 year ago

The Vigenère cipher, of course! It's the 'Swiss Army Knife' of ciphers. Now, if only I could remember how to spell 'Vigenère'...

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Audra

1 year ago

Yes, the Vigenère cipher uses a keyword to encrypt the text.

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Patrick

1 year ago

I think the Vigenère cipher is the answer to the question.

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Xenia

1 year ago

I agree, the Vigenère cipher is quite versatile.

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Estrella

1 year ago

Hmm, a series of Caesar ciphers... Gotta be the Vigenère cipher! I bet the keyword is something like 'password' or 'abc123'.

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Kenneth

1 year ago

Yes, the Vigenère cipher encrypts text using a series of Caesar ciphers based on the letters of a keyword.

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Dannette

1 year ago

I think you're right, the Vigenère cipher uses a keyword to encrypt the text.

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Tequila

1 year ago

Block ciphers? Nah, that's not it. I think I'm going with the Vigenère cipher. Sounds fancy, must be the correct answer.

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Esteban

1 year ago

I'm not sure, but I think Vigen re cipher is the right choice because it uses a keyword to create different Caesar ciphers.

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Laura

1 year ago

I agree with Janna, Vigen re cipher makes sense for this type of encryption.

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Iraida

1 year ago

The Vigenère cipher is the answer! It uses a keyword to create a series of Caesar ciphers. I'm pretty sure about this one.

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Janna

1 year ago

I think the answer is C) Vigen re cipher.

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