I want to add some tips: Exif is the one everyone knows, but don't discount #3 and #4 (i.e., identifiers added by image editing tools). To keep a photo untrac

I want to add some tips: Exif is the one everyone knows, but don't discount #3 and #4 (i.e., identifiers added by image editing tools). To keep a photo untraceable: Delete the Exif data using a tool like IrfanView. To edit the photo, download a fresh copy of an open source editing program or a commercial editing tool that does not need registration or activation. After you're done working on the photo, delete the editing program. For a higher level of security (to guard against the possibility of a GUID or hostname from the OS being embedded in the image), do all of the above on a computer that is not traceable to you, or on a fresh install of the OS, which you wipe after you are finished.