Sean suspects that an individual in his company is smuggling out secret information despite his company's careful use of data loss prevention systems. He discovers that the suspect is posting photos, including the one shown here, to public Internet message boards. What type of technique may the individuals be using to hide messages inside this image?
A. Watermarking
B. VPN
C. Steganography
D. Covert timing channel
Answer: C. Steganography
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