Today I kicked off the study groups for 2016/17. I spoke about On the Impossibility of Tight Cryptographic Reductions , from this year's Eurocrypt. Keen readers of the blog might recall that this paper is a particular favourite of mine . Since I've wrote about it before, I won't go into much detail about the paper. Instead I'll say why I (still) like it, and a bit about how it's shaped my own work this year. So, why choose this paper again? First and foremost, it's just really good . It's well w