LOL damn... well I followed a link from Akiba online and ended up there so dont blame me (^^)
this is the predecessor to RFID tagging in other words.
What I heard was that every image must have a unique origination ID in the meta header of the file to be posted, according to the suggestion by the legislators in Japan.
As such, anything posted can be tracked, but it doesnt mean someone else cant simply snap an image and re-save without metadescription headers.
Completel;y useless for protection purposes, but legislators love to impose new junk to make life difficult rather than easy.