POC: http://blog.persistent.info/2012/12/screenshot-proof-images-via-temporal.html http://blog.persistent.info/2012/12/screenshot-proof-images-... HN discussio

POC: http://blog.persistent.info/2012/12/screenshot-proof-images-via-temporal.html http://blog.persistent.info/2012/12/screenshot-proof-images-... HN discussion: http://news.ycombinator.com/item?id=4955639 http://news.ycombinator.com/item?id=4955639