Steganography and Data Hiding Techniques DFE Practice Questions (Page 8)

Questions 36–40

1. 36foundation · easy

   Which technique is commonly used in steganalysis to detect hidden data in images?

   • AComparing file sizes to a database
   • BRunning a virus scan
   • CChecking the file extension
   • DStatistical analysis of pixel values
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2. 37application · medium

   A forensic examiner is analyzing a USB drive and notices that the slack space of some files contains data that does not match the file's original content. The examiner suspects that data was hidden in the slack space. Which steganographic technique is being used?

   • AFile system steganography using slack space
   • BAudio echo hiding
   • CNetwork packet timing
   • DImage LSB insertion
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4. 38foundation · easy

   Which statement best describes the relationship between steganography and cryptography?

   • ACryptography hides the message content, while steganography hides the message's existence.
   • BThey are mutually exclusive; using one prevents using the other.
   • CSteganography is a type of cryptography that uses keys.
   • DBoth are primarily used to compress data for secure transmission.
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5. 39application · medium

   A forensic examiner is analyzing a set of images from a suspect's computer. The examiner wants to quickly identify which images may contain hidden data. Which approach is most effective for a preliminary screening?

   • AVisually inspect each image for anomalies
   • BRun statistical analysis tools like Stegdetect on all images
   • CCheck file sizes against expected sizes
   • DUse a hex editor to manually examine each image
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6. 40expert · hard

   A forensic analyst is investigating a suspect's computer and finds a WAV file that is larger than expected. The analyst suspects audio steganography but is unsure whether the technique is LSB insertion or echo hiding. Which approach would best differentiate between the two?

   • AUse Stegdetect to analyze the WAV file.
   • BOpen the file in a text editor to look for hidden text.
   • CPerform spectral analysis to look for echo patterns, and also check the LSBs of the audio samples for non-random patterns.
   • DCompare the file size to the original to determine the technique.
   Reveal Solution Discussion Select an answer first