This tutorial works remarkably well for finding hidden text. GIMP or Photoshop can be used to uncover the flag by using different filters and color ranges. There are multiple ways to find flags hidden in this manner: If you find that there are no other files hidden in the image (e.g.zip files), you should try to find flags hidden with this method. Using the tactics detailed below, can you find the flag in this image?ĭetecting this type of steganography can be somewhat challenging, but once you know it is being used there are a multitude of tools you can use to find the flag. Although the text is undiscernable to the naked eye, it is still there, and there are a variety of tools which allow the text to be extracted. The text can be hidden by making it nearly invisible (turning down it's opacity to below 5%) or using certain colors and filters on it. A simple steganography trick that is often used for watermarks instead of outright steganography is the act of hiding nearly invisible text in images.
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