CEH Enumeration and System Hacking Practice Question
Which of the following is a method of hiding files on a system using steganography?
⚠ Common exam trap
Test-takers frequently confuse encryption (which scrambles data) with steganography (which hides data's existence), leading them to select AES encryption as a hiding method rather than recognizing it as a confidentiality mechanism.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
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Embedding a secret message in an image file
Steganography is the practice of concealing a secret message within a non-secret file, such as an image, audio, or video file. By embedding data into the least significant bits (LSB) of pixel values in an image, the file appears unchanged to the casual observer, effectively hiding the secret message in plain sight.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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Encrypting a file with AES
Why it's wrong here
Encrypting a file with AES transforms its contents into an unreadable ciphertext, protecting the data's confidentiality. However, this process does not conceal the file's existence on the system. The encrypted file still occupies a visible entry in the file system, retaining its filename, size, and modification timestamps, making its presence readily detectable by anyone examining the directory structure. This method secures data but does not hide the fact that data exists.
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Renaming a file to a system filename
Why it's wrong here
Renaming a file to mimic a legitimate system filename, such as svchost.exe or explorer.exe, is a deceptive tactic aimed at blending in rather than truly hiding. While it might evade casual inspection, the file still exists as a distinct entity within the file system. Its presence can be easily uncovered through detailed directory listings, file integrity checks, or by comparing file hashes and sizes against known legitimate system files, revealing it as an anomaly.
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Embedding a secret message in an image file
Why this is correct
This method directly describes steganography, which is the art and science of hiding information within other non-secret messages or data. By embedding a secret message or an entire file within the seemingly innocuous data of a cover medium, such as an image, the existence of the hidden information is concealed. Techniques like Least Significant Bit (LSB) manipulation subtly alter the least significant bits of pixel data, making the embedded data visually imperceptible without specialized analysis tools.
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Using a rootkit to hide processes
Why it's wrong here
A rootkit is a sophisticated set of tools designed to gain and maintain surreptitious control over a computer system while actively concealing its presence and activities. While some rootkits can indeed hide files by manipulating operating system APIs to omit them from directory listings, their primary and most common function involves concealing running processes, network connections, and registry entries. This is a system-level stealth mechanism, fundamentally different from embedding data within another file.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CEH practice question is part of Courseiva's free EC-Council certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CEH exam.