Public keys

Projects

• Specter-Desktop - software wallet
• Specter-DIY - hardware wallet
• prunednode.today - pruned Bitcoin Core snapshots
• embit - python bitcoin library, also works in micropython
• micro-bitcoin - a small bitcoin library for Arduino, ARM Mbed and embedded systems
• miniscript.fun - a visual miniscript policy-to-descriptor compiler

Contacts

For consulting requests, architecture review or design, MVP development etc contact me via:

• snigirev.stepan@gmail.com
• Twitter
• Telegram

Blog posts

• 05.01.2019 - Hardware wallets can be hacked, but this is fine
  A small post on nonce exfiltration attack by malicious hardware wallet
• 13.10.2018 - ECDSA is not that bad: two-party signing without Schnorr or BLS
  How to create one ECDSA signature with two private keys
• 25.06.2018 - BLS signatures: better than Schnorr
  Overview of a very nice signature scheme
• 13.06.2018 - How Schnorr signatures may improve Bitcoin
  Overview of Musig paper and why Schnorr sigs are awesome

Selected talks and videos

Lightning hackday - Lightning hardware wallets

What we need to do to make a decent hardware wallet for Lightning network

Breaking Bitcoin - The Future of Hardware Wallets

Why CoinJoin on hardware wallets is very tricky.
Covers the standard developed in cooperation with Trezor - SLIP-0019

Value of Bitcoin - from hardware to quantum attacks

A gentle introduction to hardware security and quantum computers.

Advancing Bitcoin - the weakest points of hardware wallets

The weakest points of hardware wallets from Advancing Bitcoin conference on Vimeo.

Bitcoin meetup in London - History of hardware attacks

An overview of recent vulnerabilities on different hardware wallest - feat Ledger, Trezor, Bitbox and others. A long talk convering many different attacks.

Building your own hardware wallet - Youtube series