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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?
Suggested Answer: D
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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.
32 comments · newest first
RA
Ramonita
11 months ago
Surprised Vigenère is the answer, thought it was more complex!
TI
Timothy
11 months ago
I always get confused with these!
MA
Margot
11 months ago
Nope, just a single substitution.
AN
Annice
12 months ago
I thought Atbash was multi-alphabet too?
TY
Ty
12 months ago
Vigenère is definitely a multi-alphabet cipher!
GO
Goldie
1 year ago
I have a feeling that Vigenère is the correct choice, but I need to double-check if it really qualifies as multi-alphabet.
IE
Iesha
1 year ago
I practiced a question like this, and I believe Atbash is also a single substitution, so it can't be the answer.
GA
Gail
1 year ago
I'm not entirely sure, but I remember that Rot13 is just a single substitution cipher, right?
GR
Gregoria
1 year ago
I think the Vigenère cipher is the one we're looking for since it uses multiple alphabets based on the keyword.
CA
Catalina
1 year ago
Ugh, I always mix up the different cipher types. Let me think this through step-by-step. Rot13 uses a different alphabet, so that must be a multi-alphabet cipher. I'll go with that.
MI
Michael
1 year ago
Okay, I've got this. Rot13 is a great example of a multi-alphabet cipher because it uses a different alphabet for encoding and decoding. I'm feeling confident about this one.
TE
Terina
1 year ago
This is a classic exam question on ciphers. I think the key is to remember the difference between single substitution and multi-substitution ciphers. Rot13 is a good example of a multi-alphabet cipher.
RO
Rosalia
1 year ago
Hmm, I'm a bit confused on the difference between these types of ciphers. I'll need to review my notes to make sure I understand the concepts before answering this.
MA
Margret
1 year ago
Hmm, I'm not entirely sure about this one. I'll need to think through the different factors a data owner would need to consider before implementing a policy. Maybe I should review my notes on data governance.
RY
Ryan
1 year ago
Okay, I've got this. The key is to establish a starting point or reference point before making any improvements. That way, you can demonstrate the changes and measure the impact. I'm confident A. Baseline is the correct answer.
PR
Providencia
2 years ago
Hmm, let's see. Rot13 is just a simple shift, Caesar is also a shift, and Atbash is just flipping the alphabet. Gotta be Vigenre for the multi-sub action.
CA
Carin
2 years ago
D) Vigenre, definitely. That one's got the whole keyword thing going on, right? Sounds like a multi-sub to me.
DE
Desmond
2 years ago
Vigenre is definitely a multi-substitution cipher with its keyword feature.
IL
Ilda
2 years ago
I think Vigenre is the only multi-alphabet cipher in the options given.
NI
Nickolas
2 years ago
Yes, you're right! Vigenre uses a keyword to determine which alphabet to use for each letter.
XU
Xuan
2 years ago
D) Vigenre is indeed a multi-alphabet cipher with a keyword.
JU
Julieta
2 years ago
B) Caesar is also a single substitution cipher.
MA
Marleen
2 years ago
A) Rot13 is a single substitution cipher, not multi-sub.
DE
Delmy
2 years ago
Vigenre? Isn't that the one where you need a secret decoder ring? I'm pretty sure that's a multi-alphabet cipher.
NG
Nguyet
2 years ago
I find multi-alphabet ciphers like Vigenre more complex and secure compared to single substitution ciphers.
BR
Brice
2 years ago
It's fascinating how Vigenre uses different alphabets to encrypt messages.
AN
An
2 years ago
I remember learning about Vigenre in my cryptography class.
MA
Mariann
2 years ago
Yes, you're right! Vigenre is indeed a multi-alphabet cipher.
IS
Isabella
2 years ago
No, Rot13 is a single substitution cipher. The correct answer is D) Vigenre.
ME
Meaghan
2 years ago
I'm not sure, but I think Rot13 is also a multi-alphabet cipher.
ME
Merissa
2 years ago
I agree with Eleonora, Vigenre uses multiple alphabets for encryption.
EL
Eleonora
2 years ago
I think the answer is D) Vigenre.