Introduction We are trying to get optimized oblivious accesses to large-scale blockchains. This is collaborative work with our colleagues. Motivation As we all know, bitfcoin data has become too large to store in resource-constrained devices. It's like 240 GB. The current solution today is bip37...

paper: Introduction I am going ot talk about anonymous atomic locks for scalability and interoperability in payment-channel hubs. This is joint work with my colleagues. Scalability I will try to keep this section as short as possible. This talk is also about scalability in bitcoin. You're...

paper: Introduction Thank you for coming to my talk after lunch. This talk today is about atomic multi-channel updates with constant collateral in bitcoin-compatible payment-channel networks. It's a long title, but I hope you will understand. This is collaborative work with my colleagues. Sc...

SPV overview I have to thank the prior speaker. This is basically the same, except this time we're not using SGX. We're looking at bitcoin lightweight clients. You have a lite client with not much space not much computing power, can't store the bitcoin blockchain. All it knows about is the header i...

Backpackers: A new paradigm for secure and high-performance blockchain Thang N. Dinh

Introduction Thank you for the introduction. Today I am going to talk to you about OP\_SECURETHEBAG. It's research that I have been working on for the last couple years. I think it's very exciting and hopefully it will have a big compact. I have a lot of slides. Why are we here? We are here for ...

paper: This is shared work with my collaborators and coauthors. Smart contracts I am sure everyone here knows what a smart contract is. It's a program that can move cryptoassets. It's executed in a decentralized environment. Generally speaking, we can say there's two classes of smart contract...

Introduction Thank you everyone. I am from the Israeli Bitcoin Association. I will start by describing the problem. The problem The problem is variable transaction fees. The transaction fees shot up. There's a lot of fluctuation. To understand why this is a problem, let's go back to the basics. ...

Erlay: Bandwidth-efficient transaction relay for bitcoin paper: # Introduction Hi, my name is Gleb. I work at Chaincode Labs. I am working on making nodes better and stronger and make the network more robust. I've been working on erlay with Pieter and Greg and some other guys. # Bitcoin p2p n...

Introduction to Scaling Bitcoin Tel Aviv 2019 Freenode IRC: #bitcoin-workshops Everybody please take your seats. Just to let you know, there's electrical plugs in the center of row 1 and row 6. Otherwise, there are extension cords connected on the sides. Good morning. Welcome to Israel. My ...

Non-custodial sidechains for bitcoin utilizing plasma cash and covenants paper: slides: Introduction We have known how to do these things for at least a year, but the question is how can we find the minimum changes that we can figure out to do in bitcoin if any on how to explore the layer 2...

Introduction Prism is a consensus protocol which is a one-stop solution to all of bitcoin's scaling problems. The title is 7 to 70000 transactions per second. We have a full stack implementation of prism running and we were able to obtain 70,000 transactions/second. Before we get started, here are ...

extended abstract: History lesson In the 90s, we had some timestamping schemes where things are aggregated into one hash and then it would be publicized later in the newspaper. This scheme was commercialized, in fact. However, the resolution of the trust anchor is very limited. It's one day or h...

Introduction Cool. This addresses the lightning network which is a scaling technique for the bitcoin network. A big challenge with the lightning network is that you have these midstates that you need to keep. If you lose them, you're out of luck with your counterparty. We had a lot of talks this mo...

Introduction I am going to be giving a survey of recent progress into succinct zero-knowledge proofs. I'll survey recent developments, but I'm going to start with what zero-knowledge proofs are. This is towards SNARKs without trusted setup. I want to help you get up to date on what's happening on w...

Introduction I am going to show you proof of necessary work today. We use proof of work in a prototype. This is joint work with my collaborators. Problems We wanted to tackle the problem of bitcoin blockchain size increases. Every 10 minutes, a block is added to the blockchain and the blockchain...

# Introduction I have no affiliations. I'm just some guy. You're trusting a guy to talk about cryptography who got the date wrong. We're doing scriptless bitcoin lotteries from oblivious transfer. # Lotteries Imagine a trusted party who conducts lotteries between Alice and Bob. The goal of the lo...

A secure fountain architecture for slashing storage costs in blockchains Swanand Kadhe (UC Berkeley) paper: # Introduction I know this is the last formal talk of the day so thank you so much for being here. This is joint work with my collaborators. # Is storage really an issue for bitcoin? ...

Scriptless scripts We can write smart contracts in bitcoin today, but there's some limitations. We can do a lot of great things. We can do atomic swaps, multisig, payment channels, etc. There's a cost, though. Transactions become bigger with bigger scripts. Also, it's kind of heavy on the verifiers...

paper: Introduction I am Sergi. I will be presenting txprobe. This is baout discovering the topology of the bitcoin network using orphan transactions. There are a bunch of coauthors and collaborators. What we know about the topology I want to start by talking a little bit about what we know...

((this needs to break into individual transcripts)) Optical proof of work Mikael Dubrovsky I am working on optical proof-of-work. I'll try to pack a lot into the 10 minutes. I spent a year and a half at Techion. Physical scaling limits Probably the three big ones are, there's first the dema...

# Introduction I used to work in software. I transitioned to something else, but bitcoin changed my mind. This talk is a little bit of a work in progress. This was started by a guy named Aviv Milner who is involved with Wasabi. He roped me into this and then subsequently became unavailable. So this...

and Introduction Okay, welcome. What is zkvm? It's a multi-asset blockchain architecture that combines smart contracts and confidentiality features. It's written in pure rust from top to bottom. Agenda I'll explain the good parts, and then I'll explain away the bad parts. Sounds like a go...