The answer is bcrypt with a high cost factor, as it is the most robust approach for password storage. This is because bcrypt incorporates a unique salt to defend against rainbow table attacks and uses a configurable cost factor to deliberately slow down the hashing process, making brute-force and GPU-accelerated attacks computationally expensive. On the Systems Security Certified Practitioner SSCP exam, this concept tests your understanding of cryptographic best practices versus general-purpose hashes like SHA-256, which are fast and thus vulnerable to rapid password cracking. A common trap is choosing SHA-256 or MD5 because they are familiar, but remember that password storage requires a slow, salted, memory-hard function. Memory tip: think “Bcrypt Battles Brute-force” — the cost factor is your shield, and the salt is your camouflage.
SSCP Cryptography Practice Question
This SSCP practice question tests your understanding of cryptography. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A security engineer is designing a system to store passwords securely. Which of the following is the most robust approach for password storage?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use bcrypt with a high cost factor
Bcrypt is the most robust option because it incorporates a salt to defend against rainbow table attacks and uses a configurable cost factor to deliberately slow down the hashing process, making brute-force attacks computationally expensive. Unlike general-purpose hashes like SHA-256, bcrypt is designed specifically for password storage and resists GPU-accelerated attacks by requiring significant memory and time per attempt.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Hash passwords with SHA-256
Why it's wrong here
SHA-256 is too fast and does not include a salt by default.
✗
Encode passwords with Base64
Why it's wrong here
Base64 is encoding, not hashing; it provides no security.
✗
Encrypt passwords using AES-256 and store the key separately
Why it's wrong here
Encryption is reversible; if the key is compromised, all passwords are exposed.
✓
Use bcrypt with a high cost factor
Why this is correct
bcrypt is slow and includes a salt, making it resistant to brute-force and rainbow tables.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
ISC2 often tests the misconception that encryption (AES) is equivalent to hashing for password storage, but the trap is that encryption is reversible and introduces key management risks, whereas a proper password storage mechanism must be one-way and computationally expensive.
Detailed technical explanation
How to think about this question
Bcrypt internally uses the Blowfish cipher's key schedule to create a slow, adaptive hash; the cost factor (e.g., 10, 12) determines the number of iterations (2^cost), directly increasing computation time. In practice, a cost factor of 12 on modern hardware takes roughly 250ms per hash, which is negligible for a single login but prohibitive for mass brute-force attempts. This contrasts with SHA-256, which can compute millions of hashes per second on a GPU, making bcrypt the de facto standard for password storage in frameworks like Django and Ruby on Rails.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A developer is choosing between AES-256 (symmetric) and RSA-2048 (asymmetric) for encrypting a large file that will be sent to a partner. Symmetric encryption is fast but requires key exchange; asymmetric is slower but solves the key distribution problem. A hybrid approach — encrypt the file with AES, encrypt the AES key with RSA — is standard. Questions like this test whether you understand when each approach applies.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Cryptography — This question tests Cryptography — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use bcrypt with a high cost factor — Bcrypt is the most robust option because it incorporates a salt to defend against rainbow table attacks and uses a configurable cost factor to deliberately slow down the hashing process, making brute-force attacks computationally expensive. Unlike general-purpose hashes like SHA-256, bcrypt is designed specifically for password storage and resists GPU-accelerated attacks by requiring significant memory and time per attempt.
What should I do if I get this SSCP question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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