Tuxia guide · about 5 min
Steganography's worst enemy is compression — one pass through WeChat or QQ and the hidden data is gone. Is there a method that still recovers after compression, screenshots, and re-sharing? Obfuscation is one answer. It hides nothing; it cuts the picture into blocks and shuffles them.
An image is ultimately a pile of pixels, each with a position and a color. Obfuscation does exactly one thing: scramble the block positions, touch none of the colors. Every red dot and blue dot from the original is still there — just moved. Without knowing the "moving rules", all anyone sees is a mosaic of color blocks.
Tuxia cuts the picture into blocks tens of pixels wide and moves whole blocks: pixels inside each block stay put, only the block positions are shuffled. Bigger blocks look chunkier, smaller blocks look more shattered — three strength levels in the tool. The moving rules come from a fixed seed and are fully reversible: de-obfuscation moves every block back — pixel for pixel.
Measured: obfuscate then de-obfuscate, and the result is pixel-identical to the original (given lossless transfer).
Obfuscation changes "where", never "what color" — the image's overall color makeup is identical to the original. JPEG compression mainly discards high-frequency detail and nudges color values. Block size is a multiple of 8, so each block holds continuous original content that lines up with JPEG's 8×8 compression blocks — compression damage stays small, and after de-obfuscation the subject stays recognizable. That's the "compression can't wash it away" part.
This site uses a fixed seed + block permutation — both sides just need Tuxia with the same strength selected, no password exchange.
Try image obfuscation → ← Previous: image steganography, hiding secrets in pixels
Tuxia