Which tool is commonly used to detect stegano-hidden data in PNG and BMP images?

Which tool is commonly used to detect stegano-hidden data in PNG and BMP images?

• A. zsteg
• B. Chi-square Attack
• C. Distinguishing Statistical attack
• D. Blind Classifier attack

Answer: (A)

Detecting hidden data in images relies on inspecting how steganography often hides information—inside the least significant bits across the color channels of PNG and BMP files. zsteg is a specialized tool that targets this exactly: it analyzes PNG and BMP images, enumerating multiple bit planes and color channels to reveal any data concealed in LSBs or other planes. It can extract and display potential payloads in text, hex, or binary, helping you verify whether something covert is present. This practical, hands-on capability is why zsteg is commonly used for this purpose. The other options describe theoretical or methodological attack approaches rather than a ready-to-run tool for inspecting PNG/BMP files. They refer to statistical or classifier-based ideas about detecting steganography, but they aren’t the standard utility you’d run to quickly uncover hidden data in these image formats.

Detecting hidden data in images relies on inspecting how steganography often hides information—inside the least significant bits across the color channels of PNG and BMP files. zsteg is a specialized tool that targets this exactly: it analyzes PNG and BMP images, enumerating multiple bit planes and color channels to reveal any data concealed in LSBs or other planes. It can extract and display potential payloads in text, hex, or binary, helping you verify whether something covert is present. This practical, hands-on capability is why zsteg is commonly used for this purpose.

The other options describe theoretical or methodological attack approaches rather than a ready-to-run tool for inspecting PNG/BMP files. They refer to statistical or classifier-based ideas about detecting steganography, but they aren’t the standard utility you’d run to quickly uncover hidden data in these image formats.