ISC2 Exam ISSAP Topic 5 Question 65 Discussion

Actual exam question for ISC2's ISSAP exam

Question #: 65
Topic #: 5

In which of the following cryptographic attacking techniques does an attacker obtain encrypted messages that have been encrypted using the same encryption algorithm?

AChosen plaintext attack

BCiphertext only attack

CChosen ciphertext attack

DKnown plaintext attack

Show Suggested Answer

Suggested Answer: D

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.

by Danica at Feb 26, 2023, 05:55 AM

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Shasta

21 days ago

I'm not sure, but I think it might be C) Chosen ciphertext attack. Can someone explain why it's not that?

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Juliann

22 days ago

I agree with Madalyn, because in chosen plaintext attack, the attacker can obtain encrypted messages with the same encryption algorithm.

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Madalyn

24 days ago

I think the answer is A) Chosen plaintext attack.

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