Advice please.
Is the Exif data, especially location, visible when I attach a phone photo to my posts? Can metadata be extracted by a cunning hacker?
Does Mastodon do anything to strip the data or make it invisible to prying eyes?
If not, suggestions for how I can preserve privacy please.
@GW true, I only recently turned location on as I'm going to start using it to sort my photos.
I can strip the data on my phone, export it to a different folder and use it, but it's a barrier to easy posting of pictures.
@will_shake not sure if it depends on the instance, but it seems to remove exif metadata if you edit/resize the picture at the very least.
For those interested, here's two great #FOSS tools to remove exif metadata:
👉 Scrambled Exif
https://play.google.com/store/apps/details?id=com.jarsilio.android.scrambledeggsif&hl=en&gl=US
https://f-droid.org/packages/com.jarsilio.android.scrambledeggsif/
👉 Metadata Cleaner
https://metadatacleaner.romainvigier.fr
@will_shake If you are worried about your privacy: Each sensor(camera) has its own fingerprint. To get this fingerprint, a sufficient number of different images is required. I did some basic research on this subject. It took about 20 images from one camera to calculate recognizable PRNU noise pattern from daily life images. There are crop/translation and rotation invariant pattern matching algorithms to identify that sensors. https://en.wikipedia.org/wiki/Photo_response_non-uniformity
@DavidH interesting - could be useful for people to know it's 'me' who took the picture. Could it be used to validate ownership or online identity with the phone?
It bothers me less than broadcasting when and where I'm located.
will_shake
GW
fedops 💙💛
ricardo 
David Herzog