Facebook can track every image uploaded to it even outside of Facebook with a “hidden” digital tag

Facebook’s always at the centre of some privacy controversy or other these days. Programmer Edin Jusupovic, spotted something rather odd recently when looking at a hex dump of an image file of unknown origin.  After doing a little investigation, it appears to be IPTC “Special Instructions” injected into the image by Facebook.

Source: Facebook can track every image uploaded to it even outside of Facebook with a “hidden” digital tag

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