Tools that work when nothing else does. Your keys safe on a chip when your phone is compromised. Your messages getting through when there is no signal. Your identity yours when the platform disappears.
// Projects
Security and identity
NFC smartcard that stores seed phrases, passwords, and secrets on an EAL6+ secure element. PIN-locked. Offline. Fits in your wallet.
FIDO2 security key on a tap. Passwordless login and 2FA for Google, GitHub, Microsoft, and every WebAuthn service. A fraction of the price of a YubiKey.
Your nsec lives on a secure element. Tap to sign events. The private key never leaves the chip. Schnorr signing happens on-card, not on your device.
NIP-46 bunker signer for iOS and Android. Sign Nostr events from any client without ever exposing your private key.
Air-gapped Bitcoin signing device. Camera-based QR workflow, fully assembled. Ships with two HushChip backup cards.
Communication and engineering
BLE mesh messaging for construction sites with no WiFi and no signal. Text and voice. Works in basements, tunnels, and high-rises. Zero infrastructure.
Solar-powered BLE relay nodes that extend SiteTalkie range across entire sites. Mount on a railing, forget about them. No wiring, no network, no maintenance.
// Writing
$ cat /protocol/*/README
The Protocol Bible Series
A five-book technical reference series published by HushChip Publishing. Every major protocol standard in the Bitcoin and decentralised protocol space -- documented, explained, and cross-referenced.
The BIP Bible
170+ Bitcoin Improvement Proposals documented entry by entry. The base layer standards from BIP-1 through BIP-443 -- every proposal, every path taken and not taken.
The BOLT Bible
The complete Lightning Network specification layer. 12 BOLTs and 25+ bLIPs covering payment channels, onion routing, invoices, and the protocol that makes instant Bitcoin payments work.
The NIP Bible
Every Nostr Implementation Possibility. 90+ NIPs covering event kinds, relay messaging, encryption, zaps, and the protocol powering censorship-resistant social communication.
The SLIP Bible
Hardware wallet standards decoded. ~25 SatoshiLabs Improvement Proposals covering derivation paths, coin registration, Shamir backup, and the specs that hardware signers implement.
The Self-Custody Handbook
The practical companion. 7 sovereignty levels from exchange custody to fortress-grade self-custody with multisig, Shamir backup, and hardware-secured Nostr identity.
// About
I started building tools because the ones I needed did not exist. As an MEP engineer, I spent too much time on repetitive calculations that should have been automated. That frustration became MEP Desk — 61 engineering calculators built for building services professionals.
The same instinct led to NFC security hardware. Most people store their seed phrases on paper, stamped metal, or open QR codes — all visible to anyone who finds them. A secure element on a smartcard keeps secrets encrypted, PIN-locked, and in your wallet. That became HushChip.
SiteTalkie came from watching construction workers lose communication in basements and high-rises with no signal. BLE mesh radio solves it without infrastructure. SiteNode takes it further — outdoor mesh nodes in IP65 enclosures extending the network across any site.
Signstr connects identity to all of it — Nostr-based digital signatures for documents, built on keys you actually own.
Everything follows the same principle: do not trust infrastructure you do not control.
// Connect
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