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Exam CSSLP topic 1 question 56 discussion

Actual exam question from ISC's CSSLP
Question #: 56
Topic #: 1
[All CSSLP Questions]

Which of the following tools is used to attack the Digital Watermarking?

  • A. Steg-Only Attack
  • B. Active Attacks
  • C. 2Mosaic
  • D. Gifshuffle
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Suggested Answer: looks like a real image with no watermark in it. This attack is successful, as it is impossible to read watermark in very small pieces. Answer: D is incorrect. 🗳️
2Mosaic is a tool used for watermark breaking. It is an attack against a digital watermarking system. In this type of attack, an image is chopped into small pieces and then placed together. When this image is embedded into a web page, the web browser renders the small pieces into one image. This image
Gifshuffle is used to hide message or information inside GIF images. It is done by shuffling the colormap. This tool also provides compression and encryption.

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74gjd_37
5 months, 2 weeks ago
Selected Answer: C
2Mosaic by Fabien Petitcolas employs a so-called "presentation attack" primarily against images on a Website. 2Mosaic attacks a digital watermarking system by chopping an image into smaller subimages. On the Website, the series of small images are positioned next to each other and appear the same as the original large image (Petitcolas 2003). https://www.garykessler.net/library/fsc_stego.html
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4e3rv21rq3vq2q
1 year, 8 months ago
Selected Answer: C
C. 2Mosaic
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