Tool is used to detect stegano-hidden data in PNG and BMP image files.

Tool is used to detect stegano-hidden data in PNG and BMP image files.

• A. zsteg
• B. Chi-square Attack
• C. Known-stego Attack
• D. Stego-only Attack

Answer: (A)

Detecting hidden data in images often involves analyzing how data could be concealed in the image’s bit structure, especially the least significant bits of color channels. zsteg is a specialized tool designed for this purpose, specifically targeting PNG and BMP files. It examines multiple bit planes across the image’s color channels (such as RGB and RGBA) to reveal and potentially extract steganographically embedded payloads. It can test different LSB configurations and patterns to uncover hidden data that might be buried in these image formats. The other options describe concepts rather than a practical tool for PNG/BMP steganography detection. The chi-square attack is a statistical method used to flag anomalies indicative of LSB embedding, not a standalone PNG/BMP-focused tool. Known-stego attack and stego-only attack refer to attack scenarios in steganalysis rather than software used to detect hidden data.

Detecting hidden data in images often involves analyzing how data could be concealed in the image’s bit structure, especially the least significant bits of color channels. zsteg is a specialized tool designed for this purpose, specifically targeting PNG and BMP files. It examines multiple bit planes across the image’s color channels (such as RGB and RGBA) to reveal and potentially extract steganographically embedded payloads. It can test different LSB configurations and patterns to uncover hidden data that might be buried in these image formats.

The other options describe concepts rather than a practical tool for PNG/BMP steganography detection. The chi-square attack is a statistical method used to flag anomalies indicative of LSB embedding, not a standalone PNG/BMP-focused tool. Known-stego attack and stego-only attack refer to attack scenarios in steganalysis rather than software used to detect hidden data.