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Exam CISSP topic 1 question 31 discussion

Actual exam question from ISC's CISSP
Question #: 31
Topic #: 1
[All CISSP Questions]

Which of the following encryption technologies has the ability to function as a stream cipher?

  • A. Cipher Block Chaining (CBC) with error propagation
  • B. Electronic Code Book (ECB)
  • C. Cipher Feedback (CFB)
  • D. Feistel cipher
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Suggested Answer: C 🗳️

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Mgz156
Highly Voted 1 year, 7 months ago
Selected Answer: C
Answer is C Cipher feedback mode allows a block cipher with block size n bits to be used as a stream cipher with a data encryption unit of m bits, for any m ≤ n. In CFB mode, the block cipher operates on a register of n bits. The register is initially filled with an initialization vector.
upvoted 8 times
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6c201b2
Most Recent 1 month, 4 weeks ago
Selected Answer: C
Cipher Feedback (CFB) mode is the streaming cipher version of CBC
upvoted 1 times
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Bach1968
10 months ago
Selected Answer: C
The encryption technology that has the ability to function as a stream cipher among the options provided is option C: Cipher Feedback (CFB). Stream ciphers are encryption algorithms that encrypt data one bit or one byte at a time, providing a continuous stream of encrypted output. They are typically used for real-time applications or when encrypting large amounts of data.
upvoted 3 times
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vorozco
10 months, 2 weeks ago
Selected Answer: C
Answer is C
upvoted 1 times
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Ivanchun
1 year, 4 months ago
Selected Answer: C
C, CFB no other for stream cipher
upvoted 1 times
jackdryan
1 year ago
C is correct
upvoted 1 times
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rootic
1 year, 6 months ago
Selected Answer: C
100% C.
upvoted 1 times
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Eltooth
1 year, 6 months ago
C is correct answer. https://www.geeksforgeeks.org/difference-between-block-cipher-and-stream-cipher/amp/
upvoted 2 times
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franbarpro
1 year, 7 months ago
Selected Answer: C
Agree with C
upvoted 2 times
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Toa
1 year, 7 months ago
Answer C https://www.geeksforgeeks.org/difference-between-block-cipher-and-stream-cipher/?ref=lbp
upvoted 2 times
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