Coinkite Tapsigner
Una clave de toque-para-firmar sellada en formato de tarjeta bancaria. Cabe en una cartera; se empareja con apps móviles por NFC.
Overview
The Coinkite Tapsigner is a Bitcoin signing key sealed inside a standard bank-card form factor. There's no screen, no battery, and no buttons — you tap it to an NFC-capable phone, and a compatible app uses the card's secure element to sign. It slips into a wallet alongside your other cards and is priced very low, making it one of the most affordable and portable ways to hold a hardware-backed Bitcoin key. It's built by Coinkite, the same trusted maker behind the Coldcard.
The Tapsigner's private key is generated inside the secure element and never leaves it; the card signs transactions on-tap. It's designed to work as a companion or backup key rather than a full standalone wallet — it shines as one signer in a multisig setup, or as a convenient pocketable key you pair with a mobile app. Because it's a sealed card, it's discreet and durable.
The honest trade-offs mirror other screenless card wallets: with no display of its own, you verify transaction details on your phone, so you're trusting the phone's screen and the app more than a device that shows the destination itself. Its firmware is only partially open-source. And its card format means it's dependent on NFC-capable phones and compatible apps. For someone who wants a cheap, pocketable NFC signing key — especially as part of a multisig or as a companion to a Coldcard — the Tapsigner is a clever, well-made device; for a primary standalone wallet, a device with its own screen is safer.
Key features
- Bank-card form factor with tap-to-sign NFC
- Private key generated and held in a secure element
- Very low cost and pocketable
- Ideal as a multisig key or companion signer
- Made by Coinkite (makers of the Coldcard)
- No battery or screen — durable and discreet
- Pairs with compatible mobile apps (e.g., Nunchuk)
Especificaciones
- connection NFC
- open Source partial
- secure Element Yes
Para quién es
Personas que quieren una clave de firma NFC de bolsillo como dispositivo complementario.
Coinkite Tapsigner: Frequently asked questions
Is the Tapsigner a full standalone wallet?
It works best as a companion or multisig key rather than a primary wallet. It has no screen, so it's designed to be paired with a mobile app.
Is it as secure as a wallet with a screen?
With no display, you verify transactions on your phone, so you trust the phone and app more than a device that shows the destination itself. That's a meaningful difference for larger amounts.
Is it open-source?
Only partially. You extend some trust to Coinkite's implementation, though Coinkite has a strong Bitcoin track record.
What's a good use for it?
As one key in a multisig setup, or as a cheap, pocketable NFC signing key — often paired with a Coldcard or used with apps like Nunchuk.
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