The answer is Elliptic Curve Cryptography (ECC). This asymmetric encryption algorithm is correct because it leverages the algebraic structure of elliptic curves over finite fields to provide robust security, and its key strength lies in the fact that it delivers equivalent security to RSA with significantly smaller key sizes—for instance, a 256-bit ECC key offers comparable protection to a 3072-bit RSA key, making it far more efficient. On the Certified Ethical Hacker (CEH) exam, this question tests your understanding of asymmetric cryptography fundamentals, often appearing in the cryptography domain to distinguish between algorithms and their properties. A common trap is confusing ECC with Diffie-Hellman, which is a key exchange protocol, or mixing it up with symmetric ciphers like 3DES or hash functions like SHA-256. To remember, think of the mnemonic "ECC Equals Compact Crypto"—the smaller key size is the hallmark advantage that sets it apart from RSA.
CEH Practice Question: Advanced Topics: Wireless, Cloud, IoT, Cryptography
This CEH practice question tests your understanding of advanced topics: wireless, cloud, iot, 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.
Which asymmetric encryption algorithm is based on the algebraic structure of elliptic curves over finite fields and provides equivalent security to RSA with smaller key sizes?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Elliptic Curve Cryptography (ECC)
ECC (Elliptic Curve Cryptography) offers strong security with smaller keys compared to RSA. Diffie-Hellman is a key exchange protocol, 3DES is symmetric, and SHA-256 is a hash function.
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.
✗
SHA-256
Why it's wrong here
SHA-256 is a cryptographic hash function, not an encryption algorithm.
✗
Diffie-Hellman (DH)
Why it's wrong here
DH is a key exchange protocol, not an encryption algorithm. It can use elliptic curves (ECDH) but the algorithm itself is not ECC.
✗
Triple DES (3DES)
Why it's wrong here
3DES is a symmetric encryption algorithm, not asymmetric.
✓
Elliptic Curve Cryptography (ECC)
Why this is correct
ECC is an asymmetric encryption algorithm using elliptic curves, offering smaller key sizes than RSA for equivalent security.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 practitioner preparing for the CEH exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CEH question in full detail.
Identify which CEH exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Advanced Topics: Wireless, Cloud, IoT, Cryptography — This question tests Advanced Topics: Wireless, Cloud, IoT, Cryptography — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Elliptic Curve Cryptography (ECC) — ECC (Elliptic Curve Cryptography) offers strong security with smaller keys compared to RSA. Diffie-Hellman is a key exchange protocol, 3DES is symmetric, and SHA-256 is a hash function.
What should I do if I get this CEH question wrong?
Identify which CEH exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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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