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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
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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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JoshuaZalesky03
4 days, 5 hours ago
Selected Answer: B
✅ Correct Answer: B. Key clustering Why: Key clustering happens when two different encryption keys end up producing the same ciphertext from the same plaintext. This is very bad because it weakens the encryption and makes it easier for attackers to crack it.
upvoted 1 times
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Trayvon
6 months 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, 9 months ago
Selected Answer: A
not A?
upvoted 1 times
Narobi
11 months, 2 weeks 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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