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In which of the following cryptographic attacking techniques does an attacker obtain encrypted messages that have been encrypted using the same encryption algorithm?
Suggested Answer: D
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biophysical qualities to identify a user. Nowadays, the usage of biometric devices such as hand scanners and retinal scanners is becoming
more common in the business environment. It is the most secure method of authentication.
Answer option C is incorrect. Username and password is the least secure method of authentication in comparison of smart card and biometrics
authentication. Username and password can be intercepted.
Answer option A is incorrect. Smart card authentication is not as reliable as biometrics authentication.
Answer option B is incorrect. Anonymous authentication does not provide security as a user can log on to the system anonymously and he is
not prompted for credentials.
28 comments · newest first
DE
Devorah
11 months ago
Really? I didn't know that!
SH
Sherell
11 months ago
Wait, are we sure it's not a ciphertext only attack?
CA
Caitlin
12 months ago
Chosen ciphertext is also a possibility, but not this one.
IR
Ira
12 months ago
I thought it was a known plaintext attack.
AN
Annice
12 months ago
It's definitely a chosen plaintext attack!
TE
Tess
1 year ago
I feel like the chosen ciphertext attack might be the answer, but I need to double-check if it matches the description given in the question.
IR
Ira
1 year ago
The known plaintext attack sounds familiar, but I’m uncertain if it specifically requires the same encryption algorithm.
ED
Edison
1 year ago
I remember practicing with a question about ciphertext only attacks, but I can't recall if that one involves obtaining encrypted messages directly.
TA
Tabetha
1 year ago
I think a chosen plaintext attack is when the attacker can choose the plaintext to be encrypted, but I'm not sure if that's the right answer here.
GR
Gracia
1 year ago
I'm pretty sure the default interval for BFD packets is 1 second, so I'll go with option A.
MA
Makeda
1 year ago
I'm confident I can solve this. The answer is to create users in each database and configure the database firewall to restrict access.
DE
Delisa
1 year ago
I think all staff model HMOs are closed panel, but I'm not sure if the ambulatory care facilities part is correct or not.
JE
Jerry
1 year ago
Okay, I think I've got it. The supplier is recommending a temporary solution to the problem, which is not a permanent fix. That sounds like a workaround to me.
CL
Clay
1 year ago
I feel like LACP is the right choice, probably mode active. But I get confused between LACP and PAgP sometimes...
LA
Lachelle
1 year ago
Haha, this is a classic crypto question. I'm going with B) Ciphertext only attack. I mean, come on, who doesn't love a good old-fashioned brute force attack?
DE
Delisa
1 year ago
I'm leaning towards C) Chosen ciphertext attack. The attacker gets to choose the ciphertext and see how the system responds, which could help them figure out the encryption algorithm.
CA
Cassi
1 year ago
True, with known plaintext, the attacker has access to both the plaintext and ciphertext.
FA
Fanny
1 year ago
But what about D) Known plaintext attack? That also seems like a viable option.
IZ
Izetta
1 year ago
I agree, it allows the attacker to manipulate the ciphertext.
ST
Starr
1 year ago
I think C) Chosen ciphertext attack is a good choice.
BE
Bev
1 year ago
I'm pretty sure it's D) Known plaintext attack. If the attacker has some of the original plaintext, they can use that to try and crack the encryption algorithm.
ET
Ethan
1 year ago
Hmm, this one's tricky. I think the answer is B) Ciphertext only attack, since the attacker only has access to the encrypted messages, not the original plaintext.
LA
Lamar
1 year ago
I agree with you, it's B) Ciphertext only attack.
FR
Frederica
1 year ago
I believe it's C) Chosen ciphertext attack.
IS
Isabelle
1 year ago
I think the answer is A) Chosen plaintext attack.
SH
Shasta
2 years ago
I'm not sure, but I think it might be C) Chosen ciphertext attack. Can someone explain why it's not that?
JU
Juliann
2 years ago
I agree with Madalyn, because in chosen plaintext attack, the attacker can obtain encrypted messages with the same encryption algorithm.
MA
Madalyn
2 years ago
I think the answer is A) Chosen plaintext attack.