Don't use 'pixelation' to hide secret data - here's why

The blog post from Bishop Fox introduces a tool called Unredacter, designed to remove pixelation from images. The authors point out that pixelation is often used as a masking technique to protect sensitive information in documents, but it might not be adequate to ensure data security. Unredacter operates by analyzing the similarities between the masked image and other available images to restore the removed information. Examples are presented where the tool effectively retrieves data that appears to be hidden. With this technology, users can more readily recover concealed information, which raises both benefits and concerns about privacy. Overall, the introduction of this tool is likely to enhance many local security analyses and spark discussions concerning the ethics of its use.