Reminds me of Blizzard embedding data inside World of Warcraft screenshots (link goes to a small write-up from 2012 in a forum focused on video game cheats; sorry, could not find a better source): <a href="https://www.ownedcore.com/forums/world-of-warcraft/world-of-warcraft-general/375573-looking-inside-your-screenshots.html" rel="nofollow">https://www.ownedcore.com/forums/world-of-warcraft/world-of-...
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