What type of steganography did the suspects use?

What type of steganography did the suspects use?

• A. Text semagram
• B. Grill cipher
• C. Visual semagram
• D. Visual cipher

Answer: (C)

Hiding information in media through semantics means using the meaning or content of the image itself to convey a message, rather than altering pixels or writing in text. A visual semagram specifically refers to embedding or extracting the secret by interpreting the image’s semantic content—such as the choice of objects, scenes, colors, or arrangements—so the message is carried by what the image represents, not by hidden overlays or pixel-level tricks. This fits the scenario where suspects left a visual trace that isn’t obvious from pixel manipulation or cryptographic encoding, but from how the image’s content is deliberately chosen to signal information. A visual cipher would involve encoding data in the image’s pixels or using overlays that require a cipher to decode, which is different from relying on the image’s semantic meaning. A grill cipher is a traditional text-based/overlay technique unrelated to how the image’s content communicates meaning, and a text semagram would encode the message in textual form rather than through imagery.

Hiding information in media through semantics means using the meaning or content of the image itself to convey a message, rather than altering pixels or writing in text. A visual semagram specifically refers to embedding or extracting the secret by interpreting the image’s semantic content—such as the choice of objects, scenes, colors, or arrangements—so the message is carried by what the image represents, not by hidden overlays or pixel-level tricks.

This fits the scenario where suspects left a visual trace that isn’t obvious from pixel manipulation or cryptographic encoding, but from how the image’s content is deliberately chosen to signal information.

A visual cipher would involve encoding data in the image’s pixels or using overlays that require a cipher to decode, which is different from relying on the image’s semantic meaning. A grill cipher is a traditional text-based/overlay technique unrelated to how the image’s content communicates meaning, and a text semagram would encode the message in textual form rather than through imagery.