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ISC2 SSCP Exam - Topic 11 Question 110 Discussion

Actual exam question for ISC2's SSCP exam
Question #: 110
Topic #: 11
[All SSCP Questions]

Which of the following is more suitable for a hardware implementation?

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Suggested Answer: A

A stream cipher treats the message as a stream of bits or bytes and performs mathematical functions on them individually. The key is a random value input into the stream cipher, which it uses to ensure the randomness of the keystream data. They are more suitable for hardware implementations, because they encrypt and decrypt one bit at a time. They are intensive because each bit must be manipulated, which works better at the silicon level. Block ciphers operate a the block level, dividing the message into blocks of bits. Cipher Block chaining (CBC) and Electronic Code Book (ECB) are operation modes of DES, a block encryption algorithm.

Source: WALLHOFF, John, CBK#5 Cryptography (CISSP Study Guide), April 2002 (page 2).


by Hillary at Nov 22, 2025, 07:04 PM

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Vivienne
1 day ago
A) Stream ciphers are efficient for real-time data. Good choice!
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Stanford
6 days ago
D) Electronic code book is simple but not secure enough.
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Lisandra
12 days ago
C) Cipher block chaining is complex for hardware. Not ideal.
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Kimbery
17 days ago
I prefer B) Block ciphers. They’re more secure overall.
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Lilli
22 days ago
ECB is the easiest but not the best choice overall.
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Carmen
27 days ago
Wait, are stream ciphers really better for hardware?
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Timothy
2 months ago
I think block ciphers are more secure though.
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Tasia
2 months ago
Stream ciphers are usually faster in hardware.
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Naomi
2 months ago
Cipher block chaining? More like cipher block chaining my way to a failing grade.
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Yuette
2 months ago
Haha, who even uses ECB anymore? That's like the MySpace of encryption algorithms.
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Tegan
2 months ago
I agree, block ciphers are the clear choice here. Stream ciphers are too complex for hardware.
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Cherilyn
2 months ago
Block ciphers are definitely the way to go for hardware implementation. They're more efficient and secure.
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Evette
3 months ago
Electronic code book seems straightforward, but I think it has security issues that might make it less suitable for hardware.
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Billy
3 months ago
I remember practicing a question about block ciphers being more secure, but I don't recall if they are better for hardware specifically.
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Stephania
3 months ago
I think stream ciphers are generally more suitable for hardware because they can process data in real-time, but I'm not entirely sure.
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Jamie
3 months ago
I think I'd go with block ciphers for this one. They're more commonly used in hardware security and tend to be more robust. But I'd want to review the details to make sure I'm not missing anything.
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Keneth
3 months ago
Based on what I know, I'd say stream ciphers are the way to go for hardware implementation. They're generally faster and more efficient, which is important for hardware. But I'm not 100% sure, so I'll have to think it through carefully.
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Dana
3 months ago
Hmm, this is a tricky one. I'd say block ciphers are probably the most suitable since they're widely used in hardware security applications. But I'd need to double-check the pros and cons of each.
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Theola
4 months ago
I think A) Stream ciphers are better for hardware. Fast processing!
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Candida
4 months ago
Definitely A, stream ciphers are simpler to implement!
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Gracia
4 months ago
I feel like cipher block chaining might be more complex for hardware implementations, but I can't remember the details.
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Raina
5 months ago
I'm not sure about this one. I know block ciphers are commonly used in hardware, but I'm not sure how they compare to stream ciphers. Might need to review the differences between them.
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Irma
5 months ago
I think stream ciphers would be the most suitable for hardware implementation. They're generally faster and more efficient than block ciphers.
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Christiane
4 months ago
But block ciphers have their advantages too.
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Page
4 months ago
I agree, stream ciphers are definitely faster.
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