 Welcome back. So up on stage, we have one sob and one sob is going to tell us about ZK opera and the journey and the public goods and experiments that They've Experienced in the course of developing ZK opera Hello everyone Thank you so much for joining today's talk today's talk is about Mostly about the public goods and experiments. So it is very very for Beginners, I think you don't need any knowledge is about them. ZKP are very some Difficult math, so I think you can just listen my talk very in an easily Okay, so let me start the talk so Today a lot of our PSC team members are having presentations at that con I've been in this team from 2019 and actually today I want to share my experience during the team I'm sure that We've been keeping our own either's pretty well from 2019 I Can say like our either's I mean PSC teams either's is focusing on public goods and Doing experiments Let me rephrase it. We do public goods that others will never do if we don't do and We do experiments because sometimes Experiments are expensive and they are not it is not affordable for some other teams But actually it was pretty hard to keep the faith I mean because there are so many fun things in the Ethereum world We've had gone through the DeFi summer and if the boom and Maybe if you are some technical guy, you can launch a layer something layer network something so our team has Has been working with a lot of talented and Outstanding people but during those summer seasons We could see that many of our friends close friends becoming millionaires some of them like billionaires and You know actually what we are doing in the team is kind of a very difficult thing and also one of the most Advanced technology so maybe a lot of the teammates could get some very Big rivers if they go to market So many people left the team So in the team they are left only some types of people someone who really loves the cryptography research and the achievement or someone who truly loves the public good and Maybe someone like me who has a Strongly aligned value with the team. So today I want to share one my case share about my case Actually, this is kind of a personal stories I just found it a startup in 2012 with my friends and actually it was acquired by another Another a little bit bigger start up in 2014 and I swapped all my equities to the new one And After the question I tried to work very hard there because I stopped all my equities to the new one But I felt most of other team members Were not like me and I just found that oh Yeah, I think there is some incentive problem because the founders have like a more than 50% shares and Just imagine how much you can give to the 10th member if you're a founder. It's like I guess Less than 1% usually like 5.5% That actually it's kind of a hundred times it's kind of exponential smaller incentive for the teammates so Yeah, actually that was what I found and just to disguise these incentive problem Founders usually should have to do some lots of sweet talks to motivate the team members and For me this kind of situation were pretty exhausting. So Yeah, actually I'm not saying that founders are greedy because founders should take the older responsibility to Build a product and to build a company Actually it pretty works well for some rocket speed venture companies but For me it was very exhausted So from that time I just started to explore open sources and getting deeply Into that culture so and And Interestingly what was very inspiring to me was the contributors are giving up their commercial incentives of the of their source code and you know in our society Source codes are the most powerful means of production Doesn't sound like very communistic Hey, no, I'm from South Korea not the north Yeah, by the way, there is a very very big difference that is Freedom in the open source society the contributors give up the commercial incentives of the source code by their own freedom and we do that To run the software and to study the software and modify the software and share the software By our own freedom so this value-driven community was so fascinating for me and Because it is very very totally different with the sort of community that I was been before so And I just started to get to know about the value of sharing And then finally Actually, everyone knows which community is the most crazy value-driven community Yes, we are Yes, we are ethereum is the world of freedom by the ethereum people where we can do everything by the code I just so I just dived into this world and Just to enjoy and explore the freedom with this lovely community As a result throughout a few years of journey Now I am doing the public goods and experiments for the freedom in the team Yeah, maybe now it's a time to talk about Zika Pro Yeah, by the way that What kind of freedom I'm talking about here now Let me give you another story Once I traveled with my friends before I just sent stable coins to my friends to split the bill and Actually, my friend just added my Ethereum address to the watch list of the either skin and when my Maker-dough position got liquidated. He just messaged me. Oh my god. Where's my freedom for the privacy? so Actually This was the start of the Zika Pro project So I started to write a privacy protocol to keep my right to be free from unwarranted publicity as First I just try to implement some membo membo protocol in the ethereum just as saying as a letter to protocol using optimistic roll-up Mimbo membo is just a simple Schumer signature application but because of that it couldn't hide the transaction graph and also it had a Some problems like it needs an interactive transaction building process So from 2019 With Barry I started to write a new specification to implement Zcash on ethereum Just Using the optimistic approach. So we achieve pretty low gas cost chip transaction and also the compliance compatibility using the spending key and viewing key of the Zcash scheme and a lot of People and teammates contributed to this protocol very chance wager Kobe or Jeff Jean Rachel Takamichi Charlie Geo Kimmy a lot of people contributed this to this protocol So finally we could ship this protocol in 2020 our first version and we could ship the second version in 2021 During the development we had a lot of discussions about the growth strategy the first option for us was about Just spinning out just like ENS team but when we thought about our philosophy that we do public goods and Researches what others will never do What what does never do if you don't do in this point of view actually spinning out didn't make sense that much because already many teams like Aztec Tornado Polygon nightball and a lot other teams were already trying to ship the private protocol So Then what's the thing that? Others will never do so because other teams have their own shareholders and Because of the many things should be related to the business school business stuff Therefore sometimes the source code also becomes the means to Means to maximize the profit only for some people So what we've decided to do is shipping the reference We ship the reference specification and we ship the reference implementation and Also, we ship the reference example applications on top of our protocol and what we do is Encouraging you to fork our reference and ship your own thing for your own target customer because we believe the power of open source and We are very ready to help you everyone who wants to fork and ship your own product This is how we think about the public goods and our own ethos To be more detailed Actually, there are some reasons Good reasons that you need to fork Zikaproo The first thing is like Zikaproo's goal is To seeing everyone uses crypto payment in our daily lives like when you pay at a restaurant But when you pay at a restaurant If we have the private transaction the government Cannot tax you so we need a compliance compatibility So if you ship this protocol for your own country, then actually you can ship a Great crypto payment network for your own country, which is pretty big business, right? However, because the current version To is pretty outdated compared to the recent advancement. We are going to write new specification with everyone So we are looking for Participants who will join this journey together So what we are going to do to write the new specification is like the first for the new specification we're gonna include a recursive scheme and a better membership proof scheme Also, we're gonna support various types of token and also for the consensus part. We're gonna use hybrid finalization scheme using Zikaproo and also Optimistic approach and then we're gonna ship the reference implementation if many Parties join this journey. There may be PS team might do only some Coordination just like Ethereum 2.0 I mean the consensus layer and we're gonna ship the Zikaproo to the public And we want that other commercial party do this together because we won't do the commercialization Yeah, so it's almost end of the talk Today, I am very very happy to share our PSC teams only those and our own culture with you all so I Just want to define because this is my personal opinion I just want to define PSC teams only those as we do public goods that Others will never do if we don't do and we do the experiments Which is not affordable for many teams and also we work for a value of Ethereum personally, which is freedom. Okay. Thank you for it. Thank you very much. That's my Thank you so much Any questions? Thank you for the talk Not super familiar with ZK opproo, but when you say it's intended to be forkable Do you envision? I guess I'm curious what you see as like a project potentially forking it like is it an application specific Or is it like a potential layer 2 project looking to like build off your stack as like a Foundation for their L2 or L3 or beyond Yeah, actually, we are trying to focus on the examples like the first one is the Actually, we are trying to many experiments the next talk from Takamichi is about the experiment We are doing which is kind of private exchange So because using the private exchange we can prevent a map Actually, we are not sure that it can be usable for They'll like just like uni swap but we are just doing this experiments if others want to do wants to use it and also the another the other example that we want to really Want to see is the merchant service to shipping the crypto people or Shipping the crypto Shopify on top of Z-cop pro because Z-cop pro has a Private Adamic swap feature so you can exchange an NFT which is a digital good With your token. So this is the examples that we want to see and Maybe we are targeting these uses Great talk just one quick question. I was curious if you have any thoughts on Polygon nightfall or other sort of more commercialized versions of Z-cop pro. Yeah Actually, we are we were very very happy that when Nightfall team learned to their project because they gave us a credit They just said they inspired from our product project So actually that was kind of our first achievement in terms of our ethos Like because we want to ship the reference and actually nightfall team inspired by us and ship the project So we were very very happy and actually Including Polygon nightfall team and any other team if any any team wants to work together Then we are really happy to ship the reference specification and implementation together Great talk. I just want to ask is hmm How do you achieve a balance between experimenting and not wasting resources by while still preserving those resources and trying to maximize the innovation that comes out from that and Thank you. Yeah Maybe I think that our support designer Rachel might be a very good person who can answer this one because we were trying to do a lot of some Like, you know that we can do some experiments without shipping it We can do some experiments with some papers, right? So we are trying to do some methodologies like that and our designers are doing that really well So I'm really happy for it Thank you everyone