stegoPromedium

Новогодняя открытка (New Year Card)

hackerlab

Task: a New Year greeting PNG with scattered grey snowflakes; LSB/alpha/metadata stego all dead-end. Solution: snowflakes come in two pixel-area sizes (dot/dash); group them per horizontal row and decode each row as one Morse letter to spell HAPPYNEWYEARGUYS.

$ ls tags/ techniques/
morse_code_decodingconnected_components_labelingper_row_symbol_groupingglyph_size_binary_encodingvisual_element_stego

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