Câu 141: GSLC 2020: GIAC Security Leadership

Victor works as a professional Ethical Hacker for SecureEnet Inc. He has been assigned a job to test an image, in which some secret information is hidden, usingSteganography. Victor performs the following techniques to accomplish the task:1. Smoothening and decreasing contrast by averaging the pixels of the area where significant color transitions occurs.2. Reducing noise by adjusting color and averaging pixel value.3. Sharpening, Rotating, Resampling, and Softening the image. Which of the following Steganography attacks is Victor using?

1. A. Steg-Only Attack
2. B. Stegdetect Attack
3. C. Active Attacks — đáp án hiện tại
4. D. Chosen-Stego Attack