New tool can uncover redacted, pixelated text to reveal sensitive data


Researchers have demonstrated how a new tool can uncover redacted text from documents, potentially exposing sensitive information to nefarious actors.

The tool, called Unredacter, was released by Bishop Fox today (February 15). To demonstrate that pixilation is “a no-good, bad, insecure, surefire way to get your sensitive data leaked”, it was designed to take redacted pixelized text and reverse it back into its reveal the supposedly hidden “clear text”.

In a blog post, lead researcher Dan Petro, who wrote the tool, explained that it was created in order to complete a challenge set by Jumspec, and also due to the use of pixilation being a “pet peeve” of his.

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