I believe they broke that scheme using other methods, which I can't recall. Edit: They changed how it works on the server side, without going into detail. It's

I believe they broke that scheme using other methods, which I can't recall. Edit: They changed how it works on the server side, without going into detail. It's discussed here: https://news.ycombinator.com/item?id=2483053 https://news.ycombinator.com/item?id=2483053