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HPE6-A78 Exam - Topic 2 Question 72 Discussion

What is symmetric encryption?
C) It uses the same key to encrypt plaintext as to decrypt ciphertext.
A) It simultaneously creates ciphertext and a same-size MAC.
B) It any form of encryption mat ensures that thee ciphertext Is the same length as the plaintext.
D) It uses a Key that is double the size of the message which it encrypts.

HPE6-A78 Exam - Topic 2 Question 72 Discussion

Actual exam question for HP's HPE6-A78 exam
Question #: 72
Topic #: 2
[All HPE6-A78 Questions]

What is symmetric encryption?

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Suggested Answer: C

by Lelia at Jan 25, 2025, 10:32 AM

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Cathern
9 months ago
Option A is misleading, it doesn't create a MAC.
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Leonie
10 months ago
I thought symmetric keys had to be longer than the message.
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Veronica
10 months ago
Wait, isn't symmetric encryption supposed to be faster than asymmetric?
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Lazaro
10 months ago
Totally agree, option C is spot on!
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Tiera
10 months ago
Symmetric encryption uses the same key for both encryption and decryption.
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Laurene
10 months ago
I vaguely recall that symmetric encryption uses a single key, but I’m not sure if it’s related to the size of the key or the message itself like in option D.
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Micah
11 months ago
I’m a bit confused; I thought symmetric encryption also had to do with the length of the ciphertext matching the plaintext. Is that what option B is saying?
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Minna
11 months ago
I remember practicing a question that mentioned something about keys, and I think option C sounds right since it talks about using the same key.
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Crissy
11 months ago
I think symmetric encryption is about using the same key for both encrypting and decrypting, but I'm not entirely sure if that's the whole definition.
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Wilford
11 months ago
I'm a bit confused by the wording of these options. I know symmetric encryption has something to do with the key being the same for both encryption and decryption, but I'm not sure which option best describes that. I'll have to re-read the question and options more closely.
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Albert
11 months ago
Okay, I remember learning about symmetric encryption in class. I believe it's the type of encryption that uses the same key for both encryption and decryption, so I'll go with option C.
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Kristel
11 months ago
Hmm, this is a tricky one. I'm not totally sure about the differences between the options. I'll have to think it through carefully before selecting an answer.
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Hannah
11 months ago
I'm pretty confident I know the answer to this one. Symmetric encryption uses the same key to encrypt and decrypt the data, so option C looks like the right choice.
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Alesia
11 months ago
This is a good test of our knowledge on symmetric encryption. I'll review the key concepts quickly before selecting my answer.
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Louvenia
11 months ago
I'm pretty sure symmetric encryption uses the same key for both encryption and decryption. Let me double-check the other options to make sure I have the right understanding.
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Britt
11 months ago
Wait, I'm a bit confused. Is symmetric encryption the same as having the same key for encryption and decryption? Or is there more to it than that?
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Lenna
11 months ago
Okay, I've got a good handle on symmetric encryption from the lectures. I think I know the right answer here.
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Patria
11 months ago
Hmm, this looks like a tricky one. I'll need to think carefully about the key characteristics of symmetric encryption to answer this properly.
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Hoa
2 years ago
Symmetric encryption? More like 'same-same' encryption if you ask me. But hey, at least it's not 'asymmetric' - that would just be confusing!
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Margery
2 years ago
D) seems like it's describing a one-time pad, which is a special case of symmetric encryption. I'm sticking with C.
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Felton
2 years ago
B) sounds like it's just describing the concept of a block cipher, not symmetric encryption specifically. I'll go with C.
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Shawn
1 year ago
B) sounds like it's just describing the concept of a block cipher, not symmetric encryption specifically. I'll go with C.
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Shawn
1 year ago
C) It uses the same key to encrypt plaintext as to decrypt ciphertext.
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Nelida
2 years ago
I'm not sure, but I think option B could also be correct, ensuring same length ciphertext.
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Dong
2 years ago
I believe it's option A, as it creates both ciphertext and MAC simultaneously.
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Ty
2 years ago
I'm pretty sure it's C. I mean, if you can't encrypt and decrypt with the same key, what's the point of calling it 'symmetric'?
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Leatha
1 year ago
I'm pretty sure it's C. I mean, if you can't encrypt and decrypt with the same key, what's the point of calling it 'symmetric'?
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Danilo
1 year ago
C) It uses the same key to encrypt plaintext as to decrypt ciphertext.
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Edda
1 year ago
Yeah, that's why it's called symmetric encryption.
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Stefanie
1 year ago
B) It any form of encryption mat ensures that thee ciphertext Is the same length as the plaintext.
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Lisbeth
2 years ago
I think you're right, it does use the same key for both encryption and decryption.
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Felicitas
2 years ago
A) It simultaneously creates ciphertext and a same-size MAC.
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Belen
2 years ago
I think it's option C, because that's how symmetric encryption works.
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Catalina
2 years ago
Symmetric encryption uses the same key to encrypt and decrypt.
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Xochitl
2 years ago
C) is the correct answer. Symmetric encryption uses the same key for both encryption and decryption.
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Wynell
2 years ago
A) It simultaneously creates ciphertext and a same-size MAC.
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Wynell
2 years ago
C) It uses the same key to encrypt plaintext as to decrypt ciphertext.
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Arlyne
2 years ago
Definitely, it simplifies the process.
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Billy
2 years ago
That makes sense, it's more efficient that way.
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Carmen
2 years ago
C) It uses the same key to encrypt plaintext as to decrypt ciphertext.
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