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Exam SSCP topic 5 question 65 discussion

Actual exam question from ISC's SSCP
Question #: 65
Topic #: 5
[All SSCP Questions]

What can be defined as an instance of two different keys generating the same ciphertext from the same plaintext?

  • A. Key collision
  • B. Key clustering
  • C. Hashing
  • D. Ciphertext collision
Show Suggested Answer Hide Answer
Suggested Answer: B 🗳️
Key clustering happens when a plaintext message generates identical ciphertext messages using the same transformation algorithm, but with different keys.
Source: KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, John Wiley & Sons, 2001, Chapter 4:
Cryptography (page 130).
by bradseth at Jan. 30, 2023, 3:19 a.m.

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Trayvon
6 months, 3 weeks ago
Selected Answer: D
The correct term for this scenario is "Ciphertext collision," where two different keys generate the same ciphertext from the same plaintext. So, the answer is D.
upvoted 1 times
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irEd1
1 year, 9 months ago
Selected Answer: B
"The correct response is key clustering. In key clustering two different keys generate the same cipher text from the same plaintext."
upvoted 1 times
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bradseth
1 year, 10 months ago
Selected Answer: A
not A?
upvoted 1 times
Narobi
1 year ago
Similar scenarios except one is for hashes and the other is for ciphertexts. Collision = talking about hashes. Clustering = ciphertext
upvoted 2 times
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