I wrote about exactly this in 2007: https://it.slashdot.org/story/07/01/07/1352242/blurring-images-not-so-secure https://it.slashdot.org/story/07/01/07/1352242

I wrote about exactly this in 2007: https://it.slashdot.org/story/07/01/07/1352242/blurring-images-not-so-secure https://it.slashdot.org/story/07/01/07/1352242/blurring-imag... which was republished in 2014 in Gizmodo: https://gizmodo.com/why-you-should-never-use-pixelation-to-hide-sensitive-t-1610206920 https://gizmodo.com/why-you-should-never-use-pixelation-to-h... See also related HN comments: https://news.ycombinator.com/item?id=8078747 https://news.ycombinator.com/item?id=8078747