ScribeKey — open-source hardware security keyYour passwords.
Your keys.
Your hardware.

ScribeKey stores passwords, 2FA codes, and your ETH seed — offline, encrypted, open-source. No cloud. No trust required.

ScribeKey is an open-source hardware security key that combines a password manager, TOTP/2FA authenticator, Ethereum wallet, and FIDO2/U2F token in one offline device.

Password ManagerTOTP / 2FAETH Hardware WalletFIDO2 / U2FBluetooth 5.0PIN ProtectedAI Notes & TranscriptionHermes / Openclaw Agent

Join the Waitlist →★ GitHub

Free · No spam · Early access

┌─────────────────────────┐
│  ⟨Ξ⟩ ScribeKey    BT●  │
├─────────────────────────┤
│ > Keyboard              │
│   TOTP                  │
│   Crypto                │
│   FIDO2                 │
│   Settings              │
├─────────────────────────┤
│ # select  * back        │
└─────────────────────────┘

USB-C

OLED 128×64 · 4 buttons · USB-C · BLE 5.0

> capabilities

Everything security. One device.

Password Manager

Store up to 50 entries. USB HID auto-type or BLE keyboard — no software required.

TOTP / 2FA

RFC 6238 compliant. Import via QR code. Works with Google, GitHub, any TOTP service.

ETH Hardware Wallet

BIP44 derivation, on-device secp256k1 signing via CryptoCell-310. Keys never leave.

FIDO2 / U2F

WebAuthn hardware token over USB HID. Phishing-proof login for supported sites.

Bluetooth 5.0

BLE HID keyboard for mobile. Wireless setup via browser on Android — no USB needed.

PIN Protected

4-digit PIN. Auto-lock after 60s. Long-press to lock instantly. No PIN = no access.

AI Notes & Transcription

Record voice via BLE to your phone. AI transcribes and summarises — stored encrypted on-device. Works offline.

Hermes / Openclaw Agent

BLE bridge to your personal AI agent. ScribeKey authenticates and routes encrypted context — your AI, your keys.

> hardware

Built on real silicon.

Every spec is open. Every chip is documented. No mystery hardware.

MCUnRF52840 · ARM Cortex-M4 · 64 MHz

Flash1 MB internal + 2 MB QSPI

RAM256 KB SRAM

DisplayOLED 128×64 · SSD1306 · I²C

CryptoCryptoCell-310 · secp256k1 · AES-128/256 · SHA-256

WirelessBluetooth 5.0 · BLE HID keyboard

USBUSB-C · Full-Speed · HID + CDC

NFCNFCT pins P0.09/P0.10 · NDEF T2T (v0.3)

PowerUSB-C · Li-Po via JST connector

Size~21×17.5×3.5 mm (XIAO form factor)

LicenseMIT — firmware + hardware schematics

BOM cost~$20 self-build · $69 assembled pre-order

> getting started

Build it. Flash it. Use it.

Get the hardware

Seeed XIAO nRF52840 Sense — ~$10. Add an OLED, 4 buttons, a USB-C breakout. Total BOM under $20.

Flash the firmware

Clone the repo. One command with Arduino CLI to compile and flash. Full guide included.

Set up via browser

Open scribekey_setup.html in Chrome. Connect via USB or Bluetooth. Import passwords from CSV. Done.

$ git clone https://github.com/privatych/scribekey
$ cd scribekey/ScribeKey_fw
$ arduino-cli compile --fqbn Seeeduino:nrf52:xiaonRF52840Sense .
$ arduino-cli upload --fqbn Seeeduino:nrf52:xiaonRF52840Sense --port /dev/cu.usbmodem* .
✓ ScribeKey v1.4 flashed successfully

> assembly

Build your own.

ScribeKey is designed to be assembled at home. Full BOM, schematics, and step-by-step build photos.

photo coming soon

Components laid out

photo coming soon

Soldering the OLED module

photo coming soon

Button wiring

photo coming soon

First boot test

photo coming soon

Enclosure fit check

photo coming soon

Final assembly

> vs the alternatives

More features.
Open source.
Half the price.

Feature	▶ Our pickScribeKey	YubiKey 5	Ledger Nano X
Open Source	✅ Full MIT	❌ Closed	⚠️ Partial
ETH Hardware Wallet	✅	❌	✅
Password Manager	✅ On-device	❌	❌
TOTP / 2FA	✅ On-device	✅ (limited)	❌
FIDO2 / U2F	✅	✅	❌
BLE Keyboard	✅	❌	❌
Self-Buildable	✅ $20 BOM	❌	❌
NFC	🔄 v0.3	✅ (5C NFC)	❌
Price	$69	$50–$70	$149

Honest comparison. All data verified from public specs.

> transparency

Open source,
all the way down.

Every line of firmware is on GitHub. MIT license. Audit it, fork it, improve it. Security through transparency — not obscurity.

Firmware written in Arduino / C++
BIP32/BIP44 ETH key derivation — auditable
No proprietary SDK, no black boxes
Hardware schematics & BOM included
Web setup UI — plain HTML, zero dependencies

★ View on GitHub⚖MIT License

eth_wallet.cppMIT

// BIP44 ETH key derivation
// On-device secp256k1 — CryptoCell-310
// Keys NEVER leave the device

bool deriveETHKey(
  const uint8_t* seed,
  uint8_t* privkey_out
) {
  // m/44'/60'/0'/0/0
  uint8_t hmac[64];
  hmac_sha512(
    "Bitcoin seed", 12,
    seed, 64,
    hmac
  );
  // ... BIP32 child derivation
  // result: privkey_out
  return true;
}

// Sign with hardware RNG confirmation
bool signHash(
  const uint8_t* hash32,  // tx hash
  uint8_t* sig_out        // 65 bytes
) {
  if (!waitUserConfirm()) {
    return false; // user denied
  }
  // secp256k1_ecdsa_sign via
  // nRF CryptoCell-310
  return cc310_sign(hash32, sig_out);
}

> roadmap

What's built.
What's next.

v0.1done

Core Platform

Firmware, password vault, TOTP/2FA, ETH wallet signing, and the browser setup flow are already working in the current prototype.

v0.2done

Security, BLE, and Web Bridge

PIN protection, auto-lock, BLE keyboard mode, WebAuthn/FIDO2 groundwork, and the PWA bridge for phone-to-device workflows are in place.

v0.3in progress

Prototype Bring-Up

Parts, enclosure fit, OLED/button validation, USB HID checks, and end-to-end firmware testing are the current focus before final assembly.

v0.4in progress

Mobile App & AI Notes

Android/iOS companion flows, BLE sync, voice capture, and AI note processing are moving from experiments into a usable companion app.

v0.5planned

Custom PCB + Production Case

Dedicated PCB, battery handling, refined enclosure, and manufacturing-friendly hardware revision after prototype validation.

v1.0planned

Production Run

Small production batch, final QA, and pre-orders shipping as a fully assembled open hardware device.

> faq

Common questions.

Is it really fully open source?

Do I need to solder or build it myself?

How secure is the ETH private key?

Does it work with iPhone / iOS?

What if I lose the device?

Can I add custom passwords and TOTP seeds?

> pre-order

Reserve yours.
$69 shipped.

Fully assembled, tested, and ready to use. Expected delivery Q2 2027. Pay in ETH or BTC — no account required.

Send $69 equivalent in ETH or BTC to the address below

Fill in your email and the transaction hash (optional but speeds up confirmation)

We confirm receipt and add you to the shipping queue

— or send manually —

0x9C53f6083f7F6CC4Aa10…5a1AD7

Need help? Email hello@scribekey.dev

> support

Support the project.

ScribeKey is MIT-licensed and built in spare time. Donations fund hardware prototypes, firmware development, and keeping everything open source.

Every contribution helps. Even $5 covers a prototype component.

Ethereum (ETH)

0x9C53f6083f7F6CC4Aa…905a1AD7

Bitcoin (BTC)

bc1qvu70jyan2300jzt5…khv53ypm

┌──────────────────┐
│  ⟨Ξ⟩ ScribeKey  │
│  WAITLIST        │
│                  │
│  [_____________] │
│  [  JOIN  ──▶ ] │
│                  │
│  ✓ No spam       │
└──────────────────┘

> early access

Be first to know
when it ships.

We're validating demand before mass production. Join the waitlist — you'll get updates and a chance to pre-order at founder pricing.

ScribeKey — open-source hardware security keyYour passwords.Your keys.Your hardware.

Everything security. One device.

Password Manager

TOTP / 2FA

ETH Hardware Wallet

FIDO2 / U2F

Bluetooth 5.0

PIN Protected

AI Notes & Transcription

Hermes / Openclaw Agent

Built on real silicon.

Build it. Flash it. Use it.

Get the hardware

Flash the firmware

Set up via browser

Build your own.

More features.Open source.Half the price.

Open source,all the way down.

What's built.What's next.

Core Platform

Security, BLE, and Web Bridge

Prototype Bring-Up

Mobile App & AI Notes

Custom PCB + Production Case

Production Run

Common questions.

Reserve yours.$69 shipped.

Support the project.

Be first to knowwhen it ships.

ScribeKey — open-source hardware security keyYour passwords.
Your keys.
Your hardware.

More features.
Open source.
Half the price.

Open source,
all the way down.

What's built.
What's next.

Reserve yours.
$69 shipped.

Be first to know
when it ships.