Technical Steganography is defined as steganography that uses which method to hide the existence of a message?

• A. Steganography that uses physical or chemical means to hide the existence of a message
• B. Steganography that utilizes visual symbols or signs to hide secret messages
• C. Steganography that utilizes written natural language to hide the message in the carrier in some non-obvious ways
• D. Steganography that utilizes written JAVA language to hide the message in the carrier in some non-obvious ways

Answer: (A)

Technical steganography hides the existence of a message by physical or chemical means, using the carrier itself in the real world rather than its digital or textual content. This can include invisible ink, microdots, UV-reactive markings, or subtle alterations to a physical object that require special tools to detect. The other described approaches refer to hiding within visible symbols, linguistic text, or software code, which are not about concealing through physical properties and materials.