Pixelation Text, Mosaic Text Instantly Restored

If you have a habit of uploading images with programmed text, you may have to use other methods. Dan Petro, the chief researcher at cybersecurity firm Bishop Fox, earlier published an article that successfully cracked the mosaic algorithm and created a tool to restore the mosaic text.

How To Restore Mosaic Text

Petro’s blog not only shares the Unredacter tool he developed, but also shows how to restore mosaic text, emphasizing that mosaic is a very poor and insecure practice that reveals sensitive data, and advises users to stop using mosaic to cover up text. As you can see from the Unredacter demonstration, even if the text is covered with a thick layer of the grid, it can still be cracked with the tool.

Petro says that Unredacter can crack a mosaic no matter what tool is used, as long as it is a smear mosaic; he recommends that users cover the text directly with a traditional black strip of color blocks to prevent information leakage. He suggests the best way to prevent information leakage.

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