Public keys

Signing key for specter releases: ss-specter-release.asc
Signing key for Github commits and tags: stepan-github.asc
GPG key for email communication: stepan-gpg.asc



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

Blog posts

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

Watch on Youtube