stegoProeasy

Don't Be Afraid of the Dark

hackerlab

Task: PNG image that appears completely black. Solution: Analyzed alpha channel variations (254 vs 255) and created binary mask to reveal hidden flag text.

$ ls tags/ techniques/
steganographyimage_analysispngalpha_channelrgbatransparencypixel_analysishidden_in_dark
Alpha channel value analysisBinary mask generation from alpha differencesInvisible data in transparency layer
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