You might be able to use Hany Farid's work on doctored photographs to show they've been tampered with. See, eg, this interesting transcript of his Nova appearan

You might be able to use Hany Farid's work on doctored photographs to show they've been tampered with. See, eg, this interesting transcript of his Nova appearance. http://www.pbs.org/wgbh/nova/tech/hany-farid.html http://www.pbs.org/wgbh/nova/tech/hany-farid.html Steganography/image manipulation is an arms race but you'll keep the low end fake IDs out. At some point in the race master criminals are going to go for higher value targets than random apartments on AirBnB. And... problem solved.