Which type uses spam emails for secret communication by embedding the secret messages and hiding the embedded data in the spam emails?

• A. Web Steganography
• B. Natural Text Steganography
• C. Spam/Email Steganography
• D. DVD-ROM Steganography

Answer: (C)

Steganography hides a secret message inside another medium so its existence is concealed. When the carrier is email and the method relies on embedding the secret data within spam messages, it’s categorized as spam/email steganography. This fits because the covert communication uses spam as the cover medium, rather than hiding data in web pages or ordinary text or on a physical medium like a DVD. Web steganography hides data in web content, natural text steganography hides within normal-looking text, and DVD-ROM steganography hides data on discs. So the scenario described is spam/email steganography.