 here quickly so thanks for having me already at half past eight so another beer and I would sing on stage probably so so let me introduce you another application of cryptocurrencies you can really simplify your life so last week so it all started last week at the Cardano chart on an evaluation of this currency and I immediately spotted a peak right immediately so I thought to myself let's let's have a closer look and I zoomed into this right so here you clearly see it so if I enlarge it you see it even more clearly so around April 26 around midnight it searched immediately I mean this is a crazy event happening here so and it searched right at the time when we submitted or announced a new result so that's I mean that's great feedback right it tells you well done it's immediately and it's very objective this market it's unbiased even so it's done biased opinions are the best ones they say so I thought to myself well I mean before I now tell you what the submission really was I tell you this is a more general concept you can analyze your your day with that and then see which actions you take are positive and which which are negative so I just went into this and well here's the chart of a normal day of mine so I start to work in the morning some people don't call it morning but I call it morning and so you see it goes up right so the value it increases so it this is very good then I took a break didn't look so good so I mean dropped so sorry sorry for all of you so yes but then I mean after some up and downs during this working day I did some sports and I mean sport is healthy and then you really see that I mean it went up again when cycling a bit and well then I got home and my girlfriend told me to vacuum clean the entire flat you guess what happens right I mean it drops immediately here I mean this is just the data I mean data doesn't lie you all know it it's just a fact and I was very surprised and of course I approached my girlfriend later and then told her that I mean yeah it's just a fact and well it didn't end that well so I have to admit don't try this at home but me as a researcher so what what kind of surprised me that even this event was reflected in the in the chart so complete chaos the entire night not only I mean anyway so yeah it's it's still ongoing research so I don't fully understand this dynamic that happened there but you might imagine it can only be ongoing if I survive I mean a more a couple of more of those incidents so but I hope to do so so let me get back to the motivating example actually so what what initiated the study at all so it was an event on April 26 we announced or over us Genesis and this is the proof of state protocol without checkpoint so what do I mean so let's briefly recap checkpointing is when honest parties kind of don't accept new chains if they if they don't agree on old blocks right if if new chains arriving try to rewrite entire history that's what is with me with checkpointing so so what this new result gives you is a bootstrap so as a side effect of this boot of this checkpointing if a new party joins kind of a network in proof of state protocols I mean it has to be initialized by an honest note telling this party well this is a good change and so this is a very negative side effect so removing this is really a very important step and so we did that so in in our in this new protocol parties can join and leave at will and whenever they join they get automatically locked in into the most recent chain they don't have to do anything they just they don't have to be initialized it just get used to what is honest so that's very good and of course this only makes fun to do if you have a dynamic participation model so when parties can come and leave when they want and I think here it's appropriate to quote a very old American philosopher who once said I mean this is awesome it's huge and it's hard it might be taken a bit out of context here but it has never been more true so this new result is awesome because it really solves a practical problem it's I mean it's huge because this was gone this bootstrapping was considered the main issue in practice of proof of stake and it's hard because we really had to redo with this dynamic participation we had to redo the entire martingale analysis that appeared in prior work to accommodate for adaptive strategies that the adverse I can say and actually just among us for the last few seconds so it actually trump us quoted wrongly he also added its you see so we also do it in the universal composability framework so thank you and so this is joint work with Peter Gashi, Alexander Russell and Vasily Stignas, you find it on your page, thank you.