Which type hides any kind of file with any extension inside a carrying video file?

• A. Video Steganography
• B. Folder Steganography
• C. Document Steganography
• D. Web Steganography

Answer: (B)

The idea being tested is using a hidden directory to conceal data inside another file. A folder can contain any number of files, of any type or extension, so embedding a hidden folder inside a video file allows you to pack multiple different files into one carrier without changing the visible nature of the video. That’s why this method is the best fit for hiding “any kind of file with any extension” inside a carrying video file—the folder acts as the universal container for diverse payloads, and the video simply serves as the host.

In contrast, video steganography focuses on hiding data within the video content itself (frames or metadata of the video), not on hiding a built folder with diverse files inside it. Document steganography hides data within a document’s structure or its internal format, which limits payloads to what that document type can natively store. Web steganography hides information within web traffic or web content, again not about creating a hidden folder inside a video carrier.