bitcoin++ scales

hackathon

Hackathon Kickoff

Alex Lewin

Time

Thu, Sep 4 · 12:30 PM – 12:45 PM

Location

Main Stage

Type

hackathon

Duration

15m

Who’s the fastest scaling hacker in Istanbul? We’ll take the top 5 teams from the Expo and give them the opportunity to impress the judges live.

Speakers

Alex Lewin

Fedi

X GitHub Website

hackathon

Hackathon Team Building

Alex Lewin

Time

Thu, Sep 4 · 12:45 PM – 1:00 PM

Location

Main Stage

Type

hackathon

Duration

15m

Optional!! Come find a team to work with. We’ll help everyone find someone else to work with, and then you can start making plans for what you’ll build over lunch.

Speakers

Alex Lewin

Fedi

X GitHub Website

hackathon

Hackathon Ideas Workshop

Alex Lewin

Time

Thu, Sep 4 · 1:15 PM – 1:30 PM

Location

Main Stage

Type

hackathon

Duration

15m

Optional!! Need a good idea to hack on? Come ideate with the btc++ staff and hackathon veterans.

Speakers

Alex Lewin

Fedi

X GitHub Website

hackathon

Hacking Time

Alex Lewin

Time

Thu, Sep 4 · 1:30 PM – 4:30 PM

Location

Main Stage

Type

hackathon

Duration

3h

You don’t have much time, what are you building?

Speakers

Alex Lewin

Fedi

X GitHub Website

hackathon

Hackathon Expo

Alex Lewin

Time

Thu, Sep 4 · 5:45 PM – 8:15 PM

Location

Workshops Stage

Type

hackathon

Duration

2h 30m

Showcase your work in this round-robin style of judging

Speakers

Alex Lewin

Fedi

X GitHub Website

talk

Bitcoin x STARKs: a math match made in Heaven

A₿del ∞/21M

Time

Fri, Sep 5 · 12:30 PM – 1:15 PM

Location

Main Stage

Type

talk

Duration

45m

Explore how Zero Knowledge Proofs and STARKs in particular can be useful for Bitcoin.

Speakers

A₿del ∞/21M

StarkWare

X Nostr GitHub Website

keynote

Bitcoin’s Quantum Question

Hunter Beast

Time

Fri, Sep 5 · 1:15 PM – 2:00 PM

Location

Main Stage

Type

keynote

Duration

45m

description to come…

Speakers

Hunter Beast

Anduro

X GitHub Website

talk

WISCH, An efficient data signing scheme via correlated signatures

Ariel Futoransky, Ramsès Fernàndez

Time

Fri, Sep 5 · 1:15 PM – 2:15 PM

Location

Talks Stage

Type

talk

Duration

1h

As disputable computing protocols for Bitcoin evolve, data signing fees remain a significant portion of total operational costs. We’ll explore how WISCH, a new data signing scheme for Bitcoin, can help cut costs and optimize the efficiency of BitVMX, BitVM2, and Garbled Circuits solutions.

Speakers

Ariel Futoransky

Fairgate CSO

X GitHub Website

Ramsès Fernàndez

Fairgate Labs

GitHub Website

workshop

Enabling stateless offline Bitcoin clients with STARKs

Michael Zaikin

Time

Fri, Sep 5 · 1:15 PM – 2:00 PM

Location

Workshops Stage

Type

workshop

Duration

45m

We will explore how to "compress" SPV proofs to make them self-sufficient, so that clients do not need to store Bitcoin block headers or maintain a connection to an RPC node in order to verify transaction inclusion.

Speakers

Michael Zaikin

Starkware

X Nostr GitHub Website

talk

FLEX: Capital-Efficient Fraud-Proofs for Bitcoin Bridges

Ariel Futoransky

Time

Fri, Sep 5 · 2:15 PM – 2:45 PM

Location

Main Stage

Type

talk

Duration

30m

As Bitcoin interoperability advances, a persistent challenge remains: building secure, scalable bridges without locking up vast amounts of idle capital. FLEX (Fraud proofs with Lightweight Escrows for eXits) introduces a breakthrough approach to this problem. Built using garbled circuits and compatible with the BitVM and ecosystems, FLEX enables on-demand security bonds that are only activated when a dispute arises. This reduces costs without compromising security.

Speakers

Ariel Futoransky

Fairgate CSO

X GitHub Website

talk

Derivation of strong Bitcoin keys from lower-than-standard entropy secrets

Oleks Kurbatov

Time

Fri, Sep 5 · 2:15 PM – 2:45 PM

Location

Talks Stage

Type

talk

Duration

30m

Seed phrases were introduced in Bitcoin wallets in 2013 as a human-readable representation of cryptographic secrets, intended to be memorized rather than stored. However, most users struggle to reliably memorize even a short list of random words, creating usability and security trade-offs. This talk explores alternative approaches to Bitcoin key recovery based on entropy extraction from human-memorable data sources. The talk includes: - extracting the secret data from biometrics and real-world objects - combining it with the password and PoW to receive a reliable Bitcoin key with enough security bits - constructing the Bitcoin address in the way it can be recovered if the primary key is lost Finally, the talk will present an economic analysis of the system parameters including PoW difficulty, secret length, locktime, and attack costs needed to achieve the optimal solution from both security and time perspectives.

Speakers

Oleks Kurbatov

Distributed Lab

X GitHub Website

talk

Bitcoin bridges with garbled circuits

Ekrem BAL

Time

Fri, Sep 5 · 2:45 PM – 3:15 PM

Location

Main Stage

Type

talk

Duration

30m

Garbled circuits are surprisingly straightforward, yet powerful cryptographic constructs that enable secure computation between parties. Notably, they allow us to prove arbitrary computations on Bitcoin optimistically, significantly cheaper than earlier methods like BitVM.

Speakers

Ekrem BAL

Chainway Labs - Citrea

X GitHub Website

talk

From Theory to Practice: Making Cryptography Play Nicely with Bitcoin

Aaron Feickert

Time

Fri, Sep 5 · 2:45 PM – 3:15 PM

Location

Talks Stage

Type

talk

Duration

30m

Interesting new scaling solutions like BitVM and garbled circuits use existing and novel cryptographic constructions for bitcoin scaling. But while bitcoin offers expressivity through script, it is limited; this means we need to get clever to help new solutions play nicely with existing protocol rules. In this talk, we'll give examples of techniques we can use to carefully and thoughtfully integrate scaling solutions given bitcoin's unique limitations.

Speakers

Aaron Feickert

Alpen Labs

GitHub Website

workshop

MergeSync: towards link bound Initial Block Download

Felix Weis

Time

Fri, Sep 5 · 2:45 PM – 3:15 PM

Location

Workshops Stage

Type

workshop

Duration

30m

New technique for building the utxo set. Speed-up over 2x+ confirmed experimentally. Tech walktrough + Demo

Speakers

Felix Weis

GitHub

panel

Scaling User Experiences

Matthew Vuk, Filip Baturan, Yovela Luo, Alex Bergeron

Time

Fri, Sep 5 · 3:15 PM – 3:45 PM

Location

Main Stage

Type

panel

Duration

30m

One common complaint for Lightning, the OG layer-2 scaling solution for Bitcoin, is how complicated and difficult the onboarding experience is for new users. How do new protocols and ways of scaling improve the user experience, while maintaining guarantees for self-custody?

Speakers

Matthew Vuk

Second

X Nostr Website

Filip Baturan

Tanari

Yovela Luo

Fiamma

X GitHub Website

Alex Bergeron

Ark Labs

X GitHub Website

talk

Simple SNARKs for Local Proving

Jim Posen

Time

Fri, Sep 5 · 3:15 PM – 3:45 PM

Location

Talks Stage

Type

talk

Duration

30m

Modern ZK SNARK design has become increasingly modular, flexible, and complex, in order to squeeze out server-side performance for scaling applications. This complexity poses security risks, and yet is still insufficient for generating proofs locally on consumer hardware. Jim from Irreducible, the team leading R&D of Binius, presents new work on simpler SNARKS optimized for local proving, and the benefits of binary field-based constructions.

Speakers

Jim Posen

Irreducible

X GitHub Website

workshop

Bills of Exchange, e-cash, and the Velocity of Money

Mykyta Tymko

Time

Fri, Sep 5 · 3:15 PM – 3:45 PM

Location

Workshops Stage

Type

workshop

Duration

30m

In this workshop, we will go through the entire process from drawing a Bitcoin denominated bill of exchange between two companies, to using the ecash generated from this bill of exchange to pay for the daily needs of the employees of these companies. This session will show the full money cycle for the new Bitcoin economy, which will allow Bitcoin to scale up to use as a medium of exchange.

Speakers

Mykyta Tymko

Bitcredit Protocol

X Nostr GitHub Website

talk

Verifying Proofs on Bitcoin Today with Garbled Circuits

Liam Eagen

Time

Fri, Sep 5 · 3:45 PM – 4:30 PM

Location

Main Stage

Type

talk

Duration

45m

We can enable verification of off chain computation on bitcoin using cryptography without soft forks. This talk will describe how, what the trade offs are, and what the future might hold.

Speakers

Liam Eagen

Alpen Labs

X GitHub

talk

Bitcoin PIPEs

Misha Komarov

Time

Fri, Sep 5 · 3:45 PM – 4:30 PM

Location

Talks Stage

Type

talk

Duration

45m

Bitcoin PIPEs present a way to emulate missing functionality/opcodes for Bitcoin without additional trust assumptions or protocol extensions.

Speakers

Misha Komarov

[[alloc] init]

X GitHub Website

workshop

Faster and Cheaper Atomic Swaps

Super Testnet

Time

Fri, Sep 5 · 3:45 PM – 4:30 PM

Location

Workshops Stage

Type

workshop

Duration

45m

I will present Papa Swaps which are an invention i made to reduce the cost and duration of submarine swaps by 50%

Speakers

Super Testnet

Independent

X Nostr GitHub

hackathon

Hackathon Finals

Alex Lewin

Time

Fri, Sep 5 · 5:00 PM – 5:45 PM

Location

Main Stage

Type

hackathon

Duration

45m

Who’s the fastest scaling hacker in Istanbul? We’ll take the top 5 teams from the Expo and give them the opportunity to impress the judges live.

Speakers

Alex Lewin

Fedi

X GitHub Website

panel

BitVM: Bridging Bitcoin

Ariel Futoransky, Isabel Foxen Duke, Orkun Mahir Kılıç, Robin Linus

Time

Fri, Sep 5 · 5:45 PM – 6:30 PM

Location

Main Stage

Type

panel

Duration

45m

Panel discussion about Bridging Bitcoin

Speakers

Ariel Futoransky

Fairgate CSO

X GitHub Website

Isabel Foxen Duke

MARA

X GitHub Website

Orkun Mahir Kılıç

Citrea

X Nostr GitHub Website

Robin Linus

ZeroSync

X GitHub

keynote

Closing Ceremony

niftynei

Time

Fri, Sep 5 · 6:30 PM – 7:00 PM

Location

Main Stage

Type

keynote

Duration

30m

Speakers

niftynei

bitcoin++

X Nostr GitHub Instagram Website