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תל-אביב 2019 Tokyo 2018 Stanford 2017 Milan 2016 Hong Kong 2015 Montreal 2015

Anton Yemelyanov
Introduction SB6-1

Ben Fisch (Stanford University)
Invited Talk: A Survey of Progress in Succinct Zero Knowledge Proofs: Towards Trustless SNARKs SB6-2

Omer Shlomovits (KZen Research)
Threshold Scriptless Scripts SB6-3

Nicola Atzei, Massimo Bartoletti, Stefano Lande (University of Cagliari), Nobuko Yoshida (Imperial College London), Roberto Zunino (University of Trento)
Developing secure Bitcoin contracts with BitML SB6-4

Oleg Andreev (Stellar)
ZkVM: zero-knowledge virtual machine for fast confidential smart contracts SB6-5

Lloyd Fournier (Independent Researcher)
Scriptless Lotteries on Bitcoin from Oblivious Transfer SB6-6

Sergi Delgado Segura (UCL), Surya Bakshi, Andrew Miller (University of Illinois at Urbana-Champaign), Cristina Pérez-Solà (UOC), James Litton, Andrew Pachulski, Bobby Bhattacharjee (UMD)
TxProbe: Discovering Bitcoin's Network Topology Using Orphan Transactions SB6-7

Gleb Naumenko (Chaincode Labs), Gregory Maxwell (Independent Researcher), Pieter Wuille (Blockstream), Alexandra Fedorova, Ivan Beschastnikh (The University of British Columbia)
Bandwidth-Efficient Transaction Relay for Bitcoin SB6-8

Jeremy Rubin (Independent Researcher)
BIP: OP_SECURETHEBAG SB6-9

Meni Rosenfeld (Israeli Bitcoin Association)
Elastic Block Caps SB6-10

Duc V. Le, Adil Ahmad, Mohsen Minaei, Aniket Kate (Purdue University), Lizzy Hurtado (National University of Colombia), Byoungyoung Lee (Seoul National University)
A Tale of Two Trees: One Writes, and Other Reads, Scaling Oblivious Accesses to Large-Scale Blockchains SB6-11

Kaihua Qin, Henryk Hadass, Arthur Gervais (Imperial College London), Joel Reardon (University of Calgary)
Applying Private Information Retrieval to Lightweight Bitcoin Clients SB6-12

Aviv Milner (Black Tie Consultants) Yuval Kogman, (Independent Researcher)
ZeroLink Sudoku: Real vs. Perceived Anonymity SB6-13

Vivek Bagaria, David Tse (Stanford), Sreeram Kannan (University of Washington), Giulia Fanti (CMU), Pramod Viswanath (University of Illinois at Urbana-Champaign)
Prism: Scaling Bitcoin to Physical Limits SB6-14

Phuc Thai, Hong-Sheng Zhou, Thang Dinh (Virginia Commonwealth University), Jonathan Katz (University of Maryland), Lei Fan (Shanghai Jiao Tong University)
BackPackers: A New Paradigm for Secure and High-performance Blockchain SB6-15

.......
Overview of Dev++ Topics SB6-16

Bastien Teinturier (Acinq)
Improving routing in the Lightning Network with Trampoline Payments SB6-17

Patrick McCorry (PISA Research), Surya Bakshi, Andrew Miller (University of Illinois at Urbana-Champaign), Iddo Bentov (Cornell University), Sarah Meiklejohn (UCL)
PISA: Arbitration Outsourcing for State Channels SB6-18

Tejaswi Nadahalli, Roger Wattenhofer (ETH Zurich), Majid Khabbazian (University of Alberta)
Outpost: A Responsive Lightweight Watchtower SB6-19

Margherita Favaretto (Technical University of Denmark)
Açai: a backup protocol for Lightning Network wallets SB6-20

Dan Robinson (Paradigm)
Rainbow Network: Synthetic Assets on Lightning SB6-21

Christoph Egger (Friedrich-Alexander~University Erlangen-Nueremberg), Pedro Moreno-Sanchez, Matteo Maffei (Vienna University of Technology)
Atomic Multi-Channel Updates with Constant Collateral in Bitcoin-Compatible Payment-Channel Networks SB6-22

Georgios Konstantopoulos (Independent Researcher)
Plasma Cash: Towards more efficient Plasma Constructions SB6-23

Erkan Tairi, Pedro Moreno-Sanchez, Matteo Maffei (Vienna University of Technology)
A2L: Anonymous Atomic Locks for Scalability and Interoperability in Payment Channel Hubs SB6-24

David Vorick (Nebulous)
Recovering Payment Channel Midstates Using only The User's Seed SB6-25

Assimakis Kattis, Joseph Bonneau (New York University)
Proof of Necessary Work: Succinct State Verification with Fairness Guarantees SB6-26

Kanta Matsuura (The University of Tokyo)
Proof-of-Verification for Proof-of-Work: Miners Must Verify the Signatures on Bitcoin Transactions SB6-27

Swanand Kadhe, Jichan Chung, Kannan Ramchandran (University of California, Berkeley)
SeF: A Secure Fountain Architecture for Slashing Storage Costs of Blockchains SB6-28

Michael Dubrovsky
Optical Proof of Work SB6-29

Yoshinori Hashimoto (BUIDL, Ltd)
A Lucas Critique to the Difficulty Adjustment Algorithm of the Bitcoin System SB6-30

Daniel Marquez (MIT Media Lab)
Offline Transactions (inspired by Blockchain Ethics) SB6-31

Thomas Eizinger
Conditional Transfer of Tokens on Top of Bitcoin SB6-32

Maxim Orlovsky (Pandora Core)
Storm: layer 2/3 storage & messaging SB6-33

Karl-Johan Alm (DG Lab)
Signet SB6-35

Andrew Poelstra (Blockstream)
Miniscripts SB6-36

Bryan Bishop
Vaults SB6-37

.......
Scaling R&D Grant Awards SB6-38

Anton Yemelyanov
Introduction to Event SB5-1

Professor Jun Murai (Keio University)
Invited Talk: Deploying Blockchain At Scale. Lessons from the Internet Deployment in Japan. SB5-2

Cristina Pérez-Solà, Sergi Delgado Segura, Guillermo Navarro-Arribas and Jordi Herrera (Universitat Autònoma de Barcelona)
An Analysis of Dust in UTXO based Cryptocurrencies SB5-3

Ian Miers (Cornell Tech)
How Much Privacy is Enough? Threats, Scaling, and Trade-offs in Blockchain Privacy Protocols SB5-4

Anthony Towns (Xapo)
Playing With Fire: Adjusting Bitcoin's Block Subsidy SB5-5

Dmitry Meshkov, Alexander Chepurnoy and Vasily Kharin (Ergo Platform)
Self-Reproducing Coins as Universal Turing Machine SB5-6

Mark Friedenbach
Forward Blocks: On-chain/Settlement Capacity Increases Without the Hard-fork SB5-7

Dan Boneh (Stanford University), Manu Drijvers and Gregory Neven (DFINITY)
Compact Multi-Signatures for Smaller Blockchains SB5-8

Mustafa Al-Bassam (University College London)
Improving SPV Client Validation and Security with Fraud Proofs SB5-9

Benedikt Bünz, Benjamin Fisch and Dan Boneh (Stanford University)
A Scalable Drop in Replacement for Merkle Trees SB5-10

Olaoluwa Osuntokun (Lightning Labs)
Multi-party Channels in the UTXO Model: Challenges and Opportunities SB5-11

Giulio Malavolta (Friedrich-Alexander-University Erlangen-Nuernberg), Pedro Moreno-Sanchez (Purdue University), Clara Schneidewind (Vienna University of Technology), Aniket Kate (Purdue University) and Matteo Maffei (Vienna University of Technology)
Multi-Hop Locks for Secure, Privacy-Preserving and Interoperable Payment-Channel Networks SB5-12

Conner Fromknecht (Lightning Labs)
Instantiating [Scriptless] 2P-ECDSA: Fungible 2-of-2 MultiSigs for Today's Bitcoin SB5-13

......
WIP Session SB5-14

Eleftherios Kokoris-Kogias, Philipp Jovanovic, Linus Gasser, Nicolas Gailly, Ewa Syta and Bryan Ford (Ecole Polytechnique Fédérale de Lausanne)
OmniLedger: A Secure, Scale-Out, Decentralized Ledger via Sharding SB5-15

Yonatan Sompolinsky and Aviv Zohar (The Hebrew University of Jerusalem)
The GHOSTDAG Protocol SB5-16

Sebastián Reca (Muun)
Rebalancing in the Lightning Network: Analysis and Implications SB5-17

Nicolas Dorier (DG Lab Metaco)
Reproductible Lightning Benchmark SB5-18

Georgia Avarikioti, Felix Laufenberg, Jakub Sliwinski, Yuyi Wang and Roger Wattenhofer (ETH Zurich)
Incentivizing Payment Channel Watchtowers SB5-19

Thomas Eizinger, Lloyd Fournier and Phillip Hoenisch (CoBlox)
The State of Atomic Swaps SB5-20

Ruben Somsen
Statechains: Off-chain Transfer of UTXOs SB5-21

Hiroki Watanabe, Shigenori Ohashi, Shigeru Fujimura, Atsushi Nakadaira, Kota Hidaka and Jay Kishigami (NTT Service Evolution Labs. NTT Corp.)
Niji: Bitcoin Bridge Utilizing Payment Channels SB5-22

Alexei Zamyatin, Dominik Harz, Joshua Lind, Panayiotis Panayiotou, Arthur Gervais and William J. Knottenbelt (Imperial College London)
Interoperability with Cryptocurrency-backed Tokens SB5-23

Andrew Poelstra (Director of research Blockstream)
Workshop on scriptless scripts SB5-24

Anton Yemelyanov
Introduction to Event SB4-01

Pedro Moreno-Sanchez
Concurrency and Privacy with Payment-Channel Networks SB4-02

Ian Miers
BOLT Anonymous Payment Channels for Decentralized Currencies SB4-03

Tim Ruffing
ValueShuffle: Mixing Confidential Transactions SB4-04

Benedikt Bünz
FlyClient: Super Light Clients for Cryptocurrencies SB4-05

Harry Kalodner
BlockSci: a Platform for Blockchain Science and Exploration SB4-06

Brian N. Levine
Graphene: A New Protocol for Block Propagation Using Set Reconciliation SB4-07

Peter Rizun, Andrea Suisani, Andrew Stone
Measuring maximum sustained transaction throughput on a global network of Bitcoin nodes SB4-08

Patrick McCorry
Atomically Trading with Roger: Gambling on the success of a hardfork SB4-09

Thaddeus Dryja
Discreet Log Contracts SB4-10

Johnson Lau, Olaoluwa Osuntokun
Bitcoin script 2.0 and strengthened payment channels SB4-11

Benedikt Bünz
Invited Talk: The State of Cryptography SB4-12

Min Chen
The Future of Proof of Work SB4-13

Brian N. Levine
Bobtail: A Proof-of-Work Target that Reduces Blockchain Mining Variance SB4-14

Bobby Lee
Invited Talk: The Past, Present, and Future of Bitcoin in China SB4-15

Joi Ito
Keynote SB4-16

Aviv Zohar
How to Charge Lightning SB4-17

Andrew Poelstra
Using the Chain for what Chains are Good For SB4-18

David Vorick
Microchains SB4-19

Yonatan Sompolinsky
Incentives and Trade-offs in Transaction Selection in DAG-based Protocols SB4-20

Anthony Towns
Changes without unanimous consent SB4-21

Karl-Johan Alm
Optimizing fee estimation via the mempool state SB4-22

Or Sattath
Redesigning Bitcoin’s fee market SB4-23

Nick Szabo, Elaine Ou
Weak-Signal Radio Communications for Bitcoin Network Resilience SB4-24

Joseph Poon
Invited Talk: Plasma for Bitcoin SB4-25

Adam Back, Matt Corallo
Fungibility overview SB3-01

Adlai Chandrasekhar
JoinMarket SB3-02

Ethan Heilman and Leen AlShenibr
TumbleBit: An Untrusted Bitcoin-Compatible Anonymous Payment Hub SB3-03

Andrew Poelstra
MimbleWimble SB3-04

Meltem Demirors and Eric Lombrozo
Build – Scale – Operate: The Three Pillars of the Bitcoin Community SB3-05

Olaoluwa Osuntokun
Onion Routing in Lightning SB3-06

Pavel Prikhodko
Flare: An Approach to Routing in Lightning Network SB3-07

Tadge Dryja
Unlinkable Outsourced Channel Monitoring SB3-08

Paul Sztorc
Sidechain Scaling -- Better Strategy Can Improve TX-Throughput, Even if it Can't Improve TX-Physics SB3-09

Riccardo Casatta
Scalable and Accountable Timestamping SB3-10

...
Review of Workshops (Day 1) SB3-12

Greg Sanders
Lessons Learned with Segwit in Bitcoin SB3-13

Pieter Wuille
Elliptic Curve Schnorr-based Signatures in Bitcoin SB3-14

Jonas Schnelli
BIP151: Peer-to-Peer Encryption and Authentication from the Perspective of End-Users SB3-15

Mark Erhardt
Simulation-based Evaluation of Coin Selection Strategies SB3-16

Arthur Gervais
On the Security and Performance of Proof of Work Blockchains SB3-17

Emin Gun Sirer
Bitcoin Covenants -- Opportunities and Challenges SB3-18

Eleftherios Kokoris Kogias
Enhancing Bitcoin Security and Performance with Strong Consistency via Collective Signing SB3-19

Mark Friedenbach
Fast difficulty adjustment using a low-pass finite impulse response filter SB3-20

David Vorick
New Braiding Techniques to Achieve Significant Scaling Gains SB3-21

Peter Todd
Progress on Scaling via Client-Side Validation SB3-22

...
Review of Workshops (Day 2) SB3-23

Jorge Timon
BIP99 and uncontroversial hardforks SB2-01

Adam Back
Fungibility and scalability SB2-02

Madars Virza
Zero-knowledge proofs for Bitcoin scalability and beyond SB2-03

Andrew Poelstra
Security assumptions SB2-04

Peter Todd
In adversarial environments, blockchains don't scale SB2-05

Jonathan Bier
Why miners will not voluntarily individually produce smaller blocks SB2-06

Kalle Rosenbaum, Rusty Russell
IBLT and weak block propagation performance SB2-07

Arthur Gervais
Tampering with the delivery of blocks and transactions in Bitcoin SB2-08

Jonathan Toomim
BIP101 block propagation data from testnet SB2-09

Xiang Fu, Marshall Long, Gang Wu, Wang Chun, Robin Yao, William Tang, and Mikael Wang (moderator)
Miner's Panel SB2-10

Pindar Wong
Scaling Scaling Bitcoin SB2-11

Zooko Wilcox-OHearn
Zcash SB2-12

Cory Fields
Reworking Bitcoin Core's P2P Code to be More Robust and Event-Driven SB2-13

Ryan Grant
Unconstrained User Growth Vs. Full Node Requirements SB2-14

Maksim Boyarov and Aleksei Karpov
Concept of Bitcoin Wallet security SB2-15

Jonathan Hope
Optimal UTXO Selection SB2-16

Stanislas Marion
Bitcoin Prices,Exchanges and Blockchain Data SB2-17

Paul Sztorc
Bitcoin Hivemind, Drive Chain, Blocksize limit survey SB2-18

Peter Todd
SB2-19

Jesse Powell
Elephant Grass, Bitcoin-powered spam control SB2-20

Sergio Rocco
Data Storage Institute SB2-21

Paul Snow
Creating a general purpose data layer that sits on top of the blockchain SB2-22

Corne Plooy
Lightning network SB2-23

Jonathan Toomim
Orphaned blocks SB2-24

Elizabeth Stark
SB2-25

Pieter Wuille
Segregated witness and its impact on scalability SB2-26

Tadge Dryja
Overview of BIPs necessary for Lightning SB2-27

Joseph Poon
Network Topologies and their scalability implications on decentralized off-chain networks SB2-28

Bob McElrath
Braiding the blockchain SB2-29

Yonatan Sompolinsky
Breaking the chains of blockchain protocols SB2-30

Loi Luu
SCP: A computationally-scalable byzantine consensus protocol SB2-31

Jeff Garzik
A bevy of block size proposals: 100, 102 and more. SB2-32

Mark Friedenbach
A flexible limit: Trading subsidy for larger blocks SB2-33

Jonas Nick
Validation-cost metric SB2-34

Bryan Bishop
Review of Historical Context SB1-01

Matt Corallo
Bitcoin Relay Network SB1-02

Cory Fields
Reworking Bitcoin Core's P2P Code to be More Robust and Event-Driven SB1-03

Rusty Russell
Block Upload Data and IBLT SB1-04

Peter Todd
Overview of Security Concerns SB1-05

Ranjit Kumaresan
Scaling Bitcoin to Support Privacy-Preserving Smart Contracts SB1-06

Ittay Eyal, Emin Gün Sirer
A Testbed for Bitcoin Scaling SB1-07

Conner Fromknecht, Nathan Wilcox
Stochastic Modeling of Bitcoin with Dynamic Block Sizes SB1-08

Andrew Miller
Coinscope & Shadow-Bitcoin SB1-09

Bram Cohen
How Wallets Can Handle Real Transaction Fees SB1-10

Peter Rizun
A Transaction Fee Market Exists without a Block Size Limit SB1-11

Miles Carlsten, Harry Kalodner, Arvind Narayanan
Mind the Gap: Security Implications of the Evolution of Bitcoin Mining SB1-12

Roundtable A - Review
Leaders: Bryan Bishop
Future of SPV Technology SB1-13

Roundtable A - Review
Leaders: Matt Corallo, Rusty Russell
Network Propagation SB1-14

Roundtable A - Review
Leaders: Joseph Bonneau, Olaoluwa "Laolu" Osuntokun
Involving Academia SB1-15

Roundtable A - Review
Leaders: Paige Peterson, Dan Elitzer
Trustless UX and Human-Crypto Interaction SB1-16

Roundtable A - Review
Leaders: Peter Todd, Andrew Poelstra
Threat Models and Boogeymen SB1-17

Roundtable A - Review
Leaders: Andrew Miller, Ittay Eyal, Emin Gün Sirer
Testing and Simulation Methods SB1-18

Roundtable B - Review
Leaders: Bram Cohen, Patrick Strateman
Mathematical Modeling and Spherical Cows SB1-19

Roundtable B - Review
Leaders: Alex Petrov, Matt Corallo, Luke Dashjr
Miner-Developer Relations SB1-20

Roundtable B - Review
Leaders: Ryan Charles, Ryan Smith, Charlie Lee
Scalability and Hosted Infrastructure SB1-21

Roundtable B - Review
Leaders: Andrew Poelstra
Pathway to Adopting Better Cryptography SB1-22

Roundtable B - Review
Leaders: Zooko Wilcox-OHearn, Ranjit Kumaresan, Andrew Miller
Privacy and Scalability SB1-23

Roundtable B - Review
Leaders: Shin'Ichiro Matsuo
Potential for SHA3-like Contest Processes for Bitcoin SB1-24

Shin'ichiro Matsuo
Lessons learnt from the NIST SHA-3 Competition for scaling Bitcoin SB1-25

Paul Sztorc
Objective Functions in Bitcoin Development SB1-26

Joseph Poon, Thaddeus Dryja
Bitcoin failure modes and the role of the Lightning Network SB1-27

C.J. Plooy
Experiences Working on Layer 2 Scalability Solutions SB1-28

Jarl Fransson
Stroem - A Protocol for Microtransactions SB1-29

Sveinn Valfells
How to Mine Bitcoin Profitably SB1-30

Marshall Long
Mining True Cost SB1-31

Patrick Strateman
Initial Block Synchronization is Quadratic Time Complexity SB1-32

Eric Lombrozo
Validation Costs and Incentives SB1-33

Vlad Zamfir
Sharding the Blockchain SB1-34

Mark Friedenbach
Alternatives to a Block Size Limit as a Rate-Limiter for Validator Resource Consumption for Consideration SB1-35

Jeff Garzik
Issues Impacting Block Size Proposals SB1-36

Alex Petrov
Mathematical Formalism for Voting Process SB1-37

Harry Kalodner, Arvind Narayanan
How Will Bitcoin's Block Size Affect Non-Currency Applications? SB1-38

Nicholas Negroponte
Invited Talk SB1-39

Roundtable C - Review
Leaders: Elizabeth Stark
Communicating Without Official Structures SB1-40

Roundtable C - Review
Leaders: Joseph Poon, CJ Plooy, Jarl Fransson
Payment Channels SB1-41

Roundtable C - Review
Leaders: Justin Newton
Interfacing with the IETF, W3C, and ISPs SB1-42

Roundtable C - Review
Leaders: Marshall Long, Jinglan Wang
Perspectives and Challenges on Interfacing with China SB1-43

Roundtable C - Review
Leaders: Andrew Poelstra, Andrew Miller, SJ Klein, Arvind Narayanan
Systematizing Knowledge SB1-44

Roundtable C - Review
Leaders: Harry Kalodner, Devon Gundry
Non Currency Applications SB1-45

Roundtable D - Review
Leaders: Gregory Maxwell, Alex Chernyakhovsky
Actionable Network Events and Planned Responses SB1-47

Roundtable D - Review
Leaders: Wladimir van der Laan, Vlad Zamfir
Challenges for Major Protocol Changes and their Benefits SB1-48

Roundtable D - Review
Leaders: Suhas Daftuar, Alex Morcos, Eric Martindale
Education and Resources: How can we get 10x the number of "core" contributors? SB1-49

Roundtable D - Review
Leaders: Micah Winkelspecht, Patrick Murck
Sustainable Financing for Bitcoin's Future SB1-50

Roundtable D - Review
Leaders: Greg Sanders, Lawrence Nahum
Scalability of Wallet Technology SB1-51

Pindar Wong
Closing Session SB1-52