Atomically Trading with Roger: Gambling on the success of a hard-fork paper: This is joint work with Patrick McCorry, Andrew Miller and myslef. Patrick was originally going to give this talk but he was unable to make it. I'll give the talk with his slides. I want to acknowledge Roger Ver for perm...

Alright well, my name is Harry Kalodner, I am a student at Princeton University and I am here to tell you about a tool I built alon with some colleagues at Princeton which could be used for analyzing the blockchain in different ways. So far most of the talks today have been constructive about new wa...

I want to talk about dealing with consensus changes without so-called consensus. I am using consensus in terms of the social aspect, not in terms of the software algorithm consensus for databases. "Consensus changes without consensus". If you don't consensus on consensus, then some people are going ...

paper: Introduction I am going to talk about concurrency and privacy. This was joint work with my collaborators. Bitcoin has scalability issues. That's the main reason why we are here today. Currently the bitcoin network allows for less than 10 transactions/second. Today we have more than 135 g...

Am going to talk about cryptography relevant to blockchains. I'll talk about signatures and zero-knowledge proofs. It has a lot of applications to bitcoin. It turns out that bitcoin is pretty simple in terms of cryptography. It just uses a hash function (sha256) and,separately, ECDSA for signatures....

paper: Hello everyone. I am going to give a talk about discreet log contracts. I am from MIT DCI. I work on lightning network software and discreet log contracts. A quick intro: these are pretty new. I am not sure if they work. This presentation is part of the peer review process. Maybe the math d...

As you know, the blockchain is a chain because each block connects to the previous block through these hashes. In the header of each block is a commitment to all the transactions. It's using this merkle hash tree where at each level the parent node hashes to the children and this gives you some nice...

Brian N. Levine, College of Information and Computer Sciences, UMass Amherst This is joint work with some people I work with at UMass, including Gavin Andresen. The problem I am going to focus on in this presentation is how to relay information to a new block, to a neighbor, that doesn't know abou...

Our next talk is getting into layer 2. Leaving what needs to done at th... I am going to start with maybe a simple beginning talking about a single channel between Alice and Bob. We heard about channels yesterday so I am not going to go into details. Alice is not going to cheat Bob in my scenario. ...

Commercial effort to implement DAG-based protocols. No ICO, it's a regular company. A little bit background of DAG-based protocols. The background to this work is something we have been working at Hebrew University and Yoad. This idea of blockDAG is about layer 1 of bitcoin. And so it's a generaliz...

I would like to see a blockchain ecosystem with 1000s of transactions/second at layer 1 with full security. And so, we have to look at blockchain differently if we are going to achieve this. A brief introduction... my name is David Vorick. I have been studying bitcoin since 2011. My primary gig is ...

This is a brief history of bitcoin script evolution. Since bitcoin was active in 2009, there was a lot of emergency fixes for the first 2 years done by Satoshi. He found that people could skpi the signature check using OP\_RETURN and malformed scriptSigs. So those functions were removed. OP\_VER and...

paper: To make questions easier, we are going to have a mic on the isle. Please line up so that we can have questions quickly. Okay, now we have Ian Miers. My name is Ian Miers. Just got my PhD at Hpkins... authors of zcash, zerocash, ... My interest in bitcoin was, first getting involved, was de...

Sorry that we're running a little bit late. My name is Anton Yemelyanov. I am one of the organizers running this event. Welcome everybody. It's great to have a lot of familiar faces here. First of all, as you may know, we have ran over the last 2 days, Bitcoin Edge Dev++ where we have trained over 8...

Welcome back to Scaling Bitcoin day 2. I am sure everyone went home and tried Ethan's wagering setup yesterday. Today we are going to be covering topics like layer 2, fees, and consensus. To get us started today, we have a very special guest, Joi Ito, director of the MIT Media Lab, and he will be ta...

Andrew Stone, Bitcoin Unlimited We are 25 minutes behind schedule. We have the rest of the team wathcing remotely. I think the motivation for this project is clear. Transaction volume on the bitcoin network could be growing exponentially except that there is a limit on the number of confirmed tran...

I am a Bitcoin Core developer and I work at DG Lab. Today I would like to talk about fees. There's this weird gap between-- there are two things going on. People complain about high fees. But people are confused about why Bitcoin Core is giving high fees but if you set fees manually you can get a mu...

paper: He will be exploring alternative auction markets. Hello. This is joint work with Aviv Zohar and I have just moved. And Ron Lavi. And I am going to be talking about tehcniques from... auction theory.. to rethink how fees in bitcoin are done. Just a fast recap of how the current mechanism w...

I am Andrew Poelstra, a cryptographer at Blockstream. I am going to talk about scriptless scripts. But this is a specific example of a more general theme, which is using the blockchain as a trust anchor or commitment layer for smart contracts whose real contents don't really hit the blockchain. I'll...

What is weak-signal HF radio? These are called high frequency. That's the official name for these frequencies. Short wave is for historical reasons is longer waves and much higher frequency compared to our wireless internet frequencies. The terminology is backwards. I'll talk about the ionosphere a...

paper: Thank you. We have seen two talks now about putting privacy in layer two. But let's talk about layer one. We still don't have great privacy there. So the title of this talk is valueshuffle - mixing confidential transactions. I don't have to convince you that bitcoin at the moment is not r...