The answer is to enforce HTTPS using TLS 1.2 or higher. This is the best cryptographic control because TLS encrypts the entire HTTP session, including login credentials, preventing attackers from intercepting plaintext data during transit. Without this encryption, credentials sent over HTTP are vulnerable to packet sniffing and man-in-the-middle attacks, which a penetration tester would exploit. On the Certified Ethical Hacker CEH exam, this concept tests your understanding of secure communication protocols and common misconfigurations; a frequent trap is confusing SSL with TLS or assuming hashing alone is sufficient for transport security. Remember that TLS 1.2+ provides forward secrecy through ephemeral Diffie-Hellman key exchange, ensuring that even if a private key is compromised, past sessions remain secure. For the exam, think “TLS encrypts the pipe, not just the payload”—a quick memory tip is “HTTPS with TLS 1.2+ keeps creds from being a mess.”
CEH Cryptography and Malware Analysis Practice Question
This CEH practice question tests your understanding of cryptography and malware analysis. 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.
During a penetration test, a security analyst discovers that an organization's web application uses HTTP for login forms, potentially exposing credentials to interception. Which of the following is the BEST cryptographic control to implement to protect credentials in transit?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enforce HTTPS using TLS 1.2 or higher.
HTTPS with TLS 1.2 or higher encrypts the entire HTTP session, including login credentials, preventing interception and man-in-the-middle attacks. This is the standard cryptographic control for protecting data in transit, as mandated by RFC 2818 and PCI DSS. TLS 1.2+ uses strong cipher suites like ECDHE-RSA-AES256-GCM-SHA384 to ensure forward secrecy and confidentiality.
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.
✗
Implement password hashing with bcrypt on the server side.
Why it's wrong here
Hashing protects stored passwords from exposure if the database is compromised, but does not protect credentials in transit.
✗
Use digital signatures to sign the login request.
Why it's wrong here
Digital signatures ensure authenticity and integrity but do not encrypt the data; credentials would still be visible.
✓
Enforce HTTPS using TLS 1.2 or higher.
Why this is correct
TLS encrypts the entire communication channel, protecting credentials from interception.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Encrypt the password field using AES-256 before sending via HTTP.
Why it's wrong here
Encrypting only the password field leaves other data exposed and requires secure key distribution without TLS.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse encryption at rest (hashing) or partial encryption (AES on password field) with full-session encryption (TLS), or they think digital signatures provide confidentiality, when in fact they only ensure authenticity and integrity.
Detailed technical explanation
How to think about this question
TLS 1.2+ operates at the transport layer, encrypting all data between client and server using a handshake that negotiates cipher suites and exchanges ephemeral keys via Diffie-Hellman (ECDHE). A subtle behavior: even with HTTPS, if the login form is served over HTTP (mixed content), the initial page load can be tampered with, so HSTS (HTTP Strict Transport Security) should also be enforced to prevent downgrade attacks. In real-world scenarios, tools like Wireshark can capture plaintext credentials from HTTP POST requests, but with TLS, the entire TCP stream is encrypted.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CEH question in full detail.
Cryptography and Malware Analysis — This question tests Cryptography and Malware Analysis — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enforce HTTPS using TLS 1.2 or higher. — HTTPS with TLS 1.2 or higher encrypts the entire HTTP session, including login credentials, preventing interception and man-in-the-middle attacks. This is the standard cryptographic control for protecting data in transit, as mandated by RFC 2818 and PCI DSS. TLS 1.2+ uses strong cipher suites like ECDHE-RSA-AES256-GCM-SHA384 to ensure forward secrecy and confidentiality.
What should I do if I get this CEH question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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