312-49 · Question #534
In Steganalysis, which of the following describes a Known-stego attack?
The correct answer is C. Original and stego-object are available and the steganography algorithm is known. In steganalysis, a Known-stego attack is one where the analyst has access to both the original (cover) object and the stego-object, and also knows the steganography algorithm used. This allows direct comparison and algorithm-aware analysis to detect and extract the hidden…
Question
In Steganalysis, which of the following describes a Known-stego attack?
Options
- AThe hidden message and the corresponding stego-image are known
- BDuring the communication process, active attackers can change cover
- COriginal and stego-object are available and the steganography algorithm is known
- DOnly the steganography medium is available for analysis
How the community answered
(16 responses)- A6% (1)
- C88% (14)
- D6% (1)
Explanation
In steganalysis, a Known-stego attack is one where the analyst has access to both the original (cover) object and the stego-object, and also knows the steganography algorithm used. This allows direct comparison and algorithm-aware analysis to detect and extract the hidden message. Choice A describes a Known-message attack (hidden message and stego-image are known). Choice B describes an active/chosen-stego attack where cover media is manipulated. Choice D describes a Stego-only attack where only the stego medium is available with no other reference material.
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