3 ms·
Invisible unicode and tracking dots probably won't be captured in a highly compressed jpeg photograph of a screen, though.
by forgotoldacc 2y ago
Invisible unicode and tracking dots probably won't be captured in a highly compressed jpeg photograph of a screen, though.
- dbmnt 2y agoiPhones, Pixels, and Samsung phones have been defaulting to HEIC for around five years now, so it’s unlikely that compression alone would prevent tracking dots or other unique noise or patterns from being preserved. Steganography is a well-established technique that can definitely survive through photographs, even under compression. Variations in fonts or typography could be used for tracking too. There are plenty of creative ways this could be achieved.