If you have the habit of using the program to cover the text in a checkered way, and then upload the picture, you may need to use other methods in the future. Dan Petro, the chief researcher of the network security company Bishop Fox, published an article earlier, saying that he has successfully cracked the mosaic algorithm and created a tool that can restore the text covered by the mosaic.
In Petro’s blog, in addition to sharing the Unredacter tool he developed himself, he also showed how the program restores text covered by mosaics. Petro emphasized that mosaic is a very poor and insecure method that leaks sensitive data, and he advised netizens to stop using mosaics to cover text. As can be seen from Unredacter’s display, even if the text of the picture is marked with a thick checkered layer, it can still be cracked by tools.
Data and picture sources:ringtone、bishopfox
Similar tools for cracking mosaics have always existed, and Depix is one of them, but the disadvantage is that the shape of the text will be distorted, while Unredacter uses a matching algorithm to find the text closest to the original text to solve. Petro pointed out that Unredacter can decipher any tool, as long as it is a smear-style mosaic; he suggested that users directly use the traditional black bar to cover the text, which is the best way to prevent information leakage.
Data and picture sources:ringtone、bishopfox
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