IPFS Lisbon Meetup Jan 2018, 16 Jan 2018

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From YouTube: DClaims by João Santos @ IPFS Lisbon Meetup Jan 2018

Description

DClaims is a Distributed Verifiable Claims Platform.
Developed at Instituto Superior Técnico & INESC-ID Lisboa.

Thank you to The Block Cafe for hosting this meetup, for Protocol Labs for sponsoring the nibbles and to everyone that joined.

A

So hello, everyone, my name, is Bob and my.

B

Present my project.

A

Called the claims which stands for distributed, invertible planks so a little bit about myself. First I am student at thank you, I'm, not pursuing my masters and deployments is my thesis project.

A

So first, let's understand what credible phunkfist anyone to your.

A

Specification that it's being worked on by a VC working group and the goal is to find a way to make statements about some entities and those seconds are verifiable, so a significant vehicle application achievements, for instance a university that keeps the degree and signs that diploma with its private key or you can be like the government, issuing a statement that says that you are over 18. So when you're going to some place, that means to check for your age, you will need to show that you are over 18.

A

They don't need to know your age exactly. You just need to know that check it's true or false. So that's the motivation behind this week as technology moves for the more business more businesses or to the Internet becomes more than or necessary to make claims that can be verified instantaneously by any other person.

A

So, as I said before, the properties of verifiable finances, verifiable, meaning that anyone can take employment on its veracity, authenticity, integrity, etc. All that stuff there were local meaning that sanctity that issued and can report and letter so, for instance, technique we use in our diploma, but 10 years later, somehow they find out that I cheated on all my exams. Hopefully they won't find out.

A

We should be able to revoke my certificates. It makes just makes little sense and should be portable as well. So if technique ceases to exist tomorrow, I should be able to take control that plane may take it add 20 employer to to show it declines. This projects or a system that takes verifiable claims, the schema that I would receive, defines and implements it and you're completely distributed and trustless manner.

A

So essentially, what the claims allows you to do is to make it plain right now, so you can make the claim you can send the end to fire up that plane to anyone else and that person can verify that plane, and why is this decentralized? How do we achieve this? So planes are stored on ipfs?

A

You might have heard about it, which is way bigger, that's a distributed file system and it gives us permanent links, so the link of the plane will never be broken and it's always the same, and if the plan changes the link changes as well, so it automatically gives you a verification of integrity.

A

Also, we are using a period which forgive you who don't know it's like world computer. That's runs on the blockchain and provides a useful time, stamping surface a bowl of I'm ascending service service. On again so pretty much. Anyone can agree on the order of events which the funds are published and, on top of the clients, you can't very much build any of any of the Kishin you wants. That needs to store verifiable plans. Now motivated by recent events. We decided to use the plans to create a system to mitigate fake news.

A

What we do is provide a way for to Freud way for humans to make claims about news articles and then other people can take the clients. That's doesn't those people made, but the claims need not to be admitted to people in here and it can be like I said in the previous, like as much because on top of an AI system that did I expect news and issues claims about this, and it can use new plans as well. So.

A

Okay, so exactly so the application, that's where the claim sits right. It's a browser extension that you can install on Chrome or Firefox, and that allows you to interact with pretty much any news websites to make in the tree place.

A

So the way this is worth another like super high level at Annette. Subject: okay, that's going Ellis for each to claim, which has an ID, which is one two three and the content is just hello world now. That claim would then be stored on IVFs, so I'd be a mess with in return d multi, which is the identifier of an F on those objects, certain IGFs and then the clients takes that identifiers and stores it on an imperial smarts contract which, like a program that turns on a theorem, it's pretty much like a server.

A

Only it's super decentralized. Then, if given returns, the transaction confirmation which allows you to Chris for events that block is actually transactional in confirms, so that you're playing.

A

Okay, so if you open the Sky News website, for instance, just reload.

A

What the system does first I mean the browser extension hyper certs is it generates all the required elements to interact with the deployment platform, so in this case it generates the button where you can view claims made about that news article and it generates that's for every news article out there now, as you can see, for instance, in this news article here already, when I had a minute, I'm and right now, the information that shows is super ugly.

A

Essentially, it shows the news cycle, the user that made a claim, which is my etherium wallet ID, and the category like I said that the new that's, what's fake news for some reason now the way that the browser extension interacts with the curium. Is it you nanomask, which is a browser extension that provides a gateway for the eutherian blockchain and with many maps we can connect to your l note or you can connect one of their notes. It's pretty much up to you and also allows to assign the messages.

A

So let's say we want to issue a claim about. Well, let's take the tests you, okay, so once this page is loaded, hyper starts inserts this button here, which has a wrong title right now, not our certs declaim. Sorry, my person, s was like the name we had the week before so I'm getting used to it.

B

A

Ever state again already another problem, so you can't come here and confess this news article now this already into the UI is terrible. Just give me a break thirds, so it already shows the double. What address that you selected your III M accounts that you start that you can select on Madame s. Then you can type some stuff here. What everyone's I think I'm categorized? That's news: article: okay, let's stream bodies, for instance.

A

The next step is minimize, asks you to sign this transaction and we're using a new type of signature that Madame s supports called typed signature, which actually shows every individual item that you're signing so you're signing with this very modest word pacifying, it's an extreme bias and the text that you insert this is this one here that assigns a message and then it asks for a confirmation of the transaction.

A

Now, as you can see here, the prices for high, but we'll get to that later. It's also with all the cats running out on the theory right now, which reminds just shove. The price.

A

So once you submit it, it gives you the transaction ID, which you can check in and use for everyone, and if we go back to the other page in about like a minute or so the reduce unity here, the network is pretty slow right now and you can keep on checking the status here, but so we don't sweets or nothing you're wasting time. Just trust me I do little behavior. We can come back to that place.

A

Is it like super slow today? Oh- and this also works on other news website, so, for instance, if I open the news websites of technique, which is pure technique, pretty much the same, all we need to do is configure it small scripts. That says in which element is the news title, which is the HTML element and the news article and extension just grasps onto that website.

C

A

Before attending a news website, you should give it information to work with that website. So in this case, I had to create an object. That is the technical object that tells us. So this is a domain for technique. So when you see this menu of these elements and news titles, are this HTML elements and news articles like the HTML element in which elements on which news articles are nested in?

A

Is this one so guys you gotta tell them that stuff I mean there are some open source solutions for news of news websites parsers, but I didn't get around to just adapt one to the other one. So right now yeah you gotta put in every website you want, but you could like crowdsource that so eventually you get pretty much any news website, they're working okay, so let me see in the meantime, if.

D

You want, you could do it like. Oh yeah,.

A

Totally because actually yeah so this year, by the way I went, I was trying to so last night. This only worked for technical websites and from between wipe last night and night I was trying to put it on the CNN website, but that upside is terrible. If you open, the console is just errors everywhere, like without doing anything, it's just I was like and yeah, so just thinking like 15 seconds to load my extension like no way so I just went this guy use. There's no one cares about that one.

A

So that's reasonable! No going back to this slides, which are here cool, so a little overview of ups I just saw so what works today with deep lenses, you can simply integrate into any news websites. You can great plans about any news article you see effects and then you can do the cleanse and other people have made about that particle, and all of this works on idea, fest and.

A

The features the most important one is that it's censorship resistance I mean essentially what I feel very.

A

But facebooking a centralized platform, it has its own initiatives, we all know so at any point in time. They can just answer your comments and no one else will ever see it again. So this is not possible with the clients. Furthermore, can use websites and absolutely no control over this being run on their websites, because it's very locally I mean at most. We could change the names of the elements, but it'll take the fight to days, which is to get the system up to itself.

A

Also, it's secure. So if you may not be FS assure the integrity and authenticity of all felt of all the plans given most more precisely Imperium sure the authenticity and EFS gives the integrity, because, yes, if the file changes, the app the link chains as well and there's a single point of failure, it's like that's the default under the super distributed system such as this one, you would have to pretty much destroy all many ifs smells out there and your own home.

A

The etherium knows out there as well and pretty much the world at that point.

A

So what to lurk in the next three months, which is my deadline to deliver my Ezz.

A

So, first of all we're going to introduce what we call publishers, I, don't know if you check the price when I may have claimed it was about four dollars and even experience was lower. I like at $250, which is way lower than is today to be some like a dollar, and none of us would pay dollars to come in something too much.

A

So what publishers do is allows for planes to be issued as a batch. So publisher is like the sidechain proxies something that stands between your computer and the network which listens for claims about a given article and when a certain article achieves the thresholds. Let's say I'm going to wait for alleged claims for this article. Then you can batch all those cleansings one and get the subjects, and it should have only really only one transaction, so you're splitting those for the lawyers by hundreds or by the threshold. Then she says: okay,.

D

You could just take all the comments of everybody. Oh yeah,.

A

That's not reality, that's true. The reason why we're not doing that at least yet is because the on the smart contract claims are indexed by the news article. So what you do essentially is you generate the bridge article which URL, which is not very resilient, can definitely be improved, but you get the idea and then you fetched the smart contract support. Okay, give me all the IDF s. Links for claims for this I need this names article and so in June, but don't you say can't be that involved for sure. It's really.

A

It's really like the database problem, but I essentially want to are going to be mixing megabyte and right now, just for the most recent purposes, I mean you could make like a repository for all the clients and using much better ways to make the claims for short, so publishers all along to reduce the cost efficient. You can even have, like a publisher system, run these repeatedly yeah I'm good through its form, where no sorry upon themselves to be shippers forgiving particle.

A

So we don't really need to centralized Authority that you can just have like some program. That runs on the sugar, your network and then oh.

A

Yes, I like deep lines and facebook like button, you could pretty much make a nice it once and there will be no limits. You would not be congested need to be a network, my catsuit so, and we also think about reducing curators, which are entities that stake, client already exists and generate new claims.

A

So an example the curator would be I would take all the claims that I can find in the palms and article that you just saw about the flu and then I make a new claim that says 70% of the plant specify this has been used. There are 20% that say that this is a good article and in there 10% it's a whatever. It has to be a new plan, so you could essentially subscribe to claims made by curators, because you would have more information than single client side. Oh, and you can also.

E

With my reputation system.

A

Of of curators, like focus or something so creative organization, and so that would be weight higher any algorithm. You could then run to analyze plans and display information.

F

Obviously, like this information wars that are going on these things, which is.

F

All about how ops and what armies can falsify full stood by how many things to do so. I.

B

Know the whole curation is looking about and.

F

There's all these subsets, they lost just a black dart web website. Their abuses well legitimate purchases of these memory.

F

Well as much contract, essentially.

A

Like a server everything yeah that anyone can use as long as they pay for it.

A

So in this case it's true that anyone can write claims into the contracts, but on the user signs in there easily, you have to create the white list saying that issuers, that you trust, so you say I want to trust a BNC and there's a claim from D I'll, never see that fight, I mean you can actually implement and reputation above that, obviously, which is a whole other world, or you can just trust the people that your friends trust and if one of the people on the in your right place ever screws up, you can just remove it from the list and that's case closed and I mean yeah, and also there is the obvious barry of the costs, but with all the shirts, it essentially becomes free to create life.

A

So that would be a problem, but there's the wife lewis finger and, furthermore, publishers have an interest on not.

B

Publishing, like banks, they.

A

Want to say so.

A

Which isn't like why everything to find people using Bachchan's as well? So even there are your education system is only three such ones. There are some based on a theory. My cross name. You've worked exactly. You also have BTC R, which is built on top of Bitcoin.

A

So you have all these tools that you can use to mitigate that problem. Yeah.

B

A

Open waste true, but you can choose what you want to see: I, don't.

G

Really care, why are you using it because it's more for kind of time, anything your smart contract, that is that has a site and runs over time and use for like a static thing with the indexing, but isn't there any way to do it more efficient, so kind of indexing mechanism of the top of ipfs I, don't know there are I think there are some database one be chain that provides some kind of indexing magnetic changing event.

A

Essentially, the centralized point failure, because if it's the dictionary or an IP address, is to have sort of their servers and solve each interview, words, but furthermore like much what to do in the future is put everything in Imperium I mean you know, I think it's true. Ideally, even when you wouldn't want to do any competition yourself, it thinks before does they should go. It will become much cheaper and much more common comment as to the competition, so you can loom there.

A

Also, it rings really my thing to make it politically distributed and trustless, because if I was going to choose to server somewhere, I could just use. Facebook gives me the same guarantees.

C

Okay, so that question is really immutability question you can totally think like. I can ask to point to the latest state of the registry of all the tags that exists. Then you can use TR disease to then make sure that the step-index call SS converges very quickly, but you still rely off stomach for structure to be present and all times that B can be confident about ours, and if you need something to be present about virus and you have the world together, that's right and like being verified and being checked right.

C

So you use e3m to make sure that the index, the registry is always there and if you always at this point of contact so because I can find you that type in s, austerities I'm still I would still to rely in X amount of notes on my PFS to fetch it there. And if you want to be absolutely I almost beat your proof. Do you want that? Something that never subscribed.

H

B

About so I get that the pump using publishers is a solution to having people not have to pay that transaction fees for making claims, but like what do you feel about the confirmation bias from people say like trusting a certain publisher and trusting their friends and I mean that, like seems like basically the problem with beta news. That's.

A

Like a great question,.

B

It's one: that's where.

A

My money's, which is like that, will exist so right now, I think if you like the best proof of such a might be super simple proof of something and if you believe, before almost like everyone included know. So this is about allowing that to people who actually want to know the truth. They have a good way of millions. People are actually interested in learning and going over there. It's not about show like this involves the mixing people that pull the warning is reality.

A

It's not the target audience at all, because those people will just say yeah whatever you're lying.

A

So the goal here is, if you actually want to know, we want to market and educate yourself we're trying to lower the difficulty. What we're doing this.

A

Hey it was also another question right physic. There was the trust in the publisher, the publisher, okay,.

C

A

That's that's a separate question so essentially, when you issue apply to the publisher, the publisher gives you receipts like something that is just signed. One time stamps I receive this claim. It's the hash progressive sign boom. You got us, you can also say something like this should be issued within the next hour. You can the metrics note along usual time and then like two hours go by. You want to hear you. You worried that that transaction I mean that's block. That claim that she makes, if you don't get it back.

A

You can yourself make a client saying this issue. Promise me to issue to this publisher. Promise me tuition is fine, but it didn't so then you have a list of misbehaved publishers and you would stop trusting those publishers which is an optional having facebook presence or that's.

D

The golden, so if.

A

You thought about the receipt, which is a good.

D

Way to do it, then you don't need the Dutch chain, because you don't need to thanks that main server. As long as you have the receipt from the server, so you put up some single point of failure. If you want it could be, it could be distributed on neck, but became even is something unfold, because, as.

B

Long as like, as soon as you put your.

D

Relation between saying this is a good article.

D

They have to send you a receipt right if they don't send your receipt, but if they make your receipt and then they don't count your votes, you have ways to verify that in the way they keep the result, they could give the result, as I was saying before, like a rubber tree or any any kind of treat that cache the country, and you can verify that your plane is ready in there and if it's not, then you have your receipt, so you can prove that the publisher is in bad behavior mode.

D

So you don't need to thank standing server to the blockchain, which is really thick. This is a previous game of baduk change, thanks something server, but you don't really.

I

Need it because you have it well, so what you have in case.

A

Of curators you like to have the blockchain for when their issue, employees that were dependent on other plants and using the visor, so don't you suggest we're looking a long chain essentially with independent publishers columns. Then we can be a way to circumvent this. This case, publishers are an option. If you're an organization, big big enough, you can't pay for your own plane. Don't we need a publisher for anything. This is really.

B

A

Comments may contain the Japan's failed, as I mentioned and again like I said. Ideally, you want to override publisher, so you don't want to make it economical. You want to make you not to create an economic incentive to make claims and somehow be rewarded for that, and that's why you somehow be able to play through influence all the time and you wouldn't leave the publisher. All publisher is like an optimization right now for scalability continue today to make everyone loses.

D

D

D

D

You have one person made King, but who is not right? Which nation.

A

The smarts the way, oh there's the thing of authenticating the issuer's. Why?

A

Because right now, if you do that for free, like into season as a sender, to make sure that someone is say they are publishers that saying yeah, that's okay, you to be centralized in the public infrastructure. There's no other movement called really loves. Trust, which is it's essentially trying to make me, should be to find out we distributed on top of this okay.

B

A

Yeah you, because we.

F

People must using these services.

E

A

This money could use it right now if you withstand the terrible user interface. Also, it's only deployed on the Testaments, but people don't maybe.

F

Know and that other users.

A

To contributing to do too absolutely stuff and if it smells ready in, you should have like servers that were into flames, because the thing here is I make it like I close, my laptop. No one else has the client oils gonna choose the plan, so you have to find a way to single if I'm, some other server yeah. So massive option is required for this to work.

F

Flawlessly others look thinking, clock train was awaiting for messed up you just access card, which is an interesting question, because all these things they're hypothetical there are all some things that could really change well, but you know it's become mainstream few months.

E