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Coinkite Coldcard
Details and User Reviews 2020

  • the seed is stored in a special chip designed to store secrets securely
  • all code is open source and can be compiled by anyone
  • hardware wallet with the option to never connect to a computer for full operation

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Details Approved
  • Buy directly from the manufacturer without intermediaries

Coinkite Coldcard Description 2020

(2 votes, rate product)

The world needs an open, cheap and secure hardware wallet

What is the Coinkite Coldcard? It is a Bitcoin hardware wallet that can be used offline and signed for transactions.

  • BIP39 based, meaning you can back up the secret words on paper and have many sub-accounts and unlimited independent payment addresses. Now with BIP39 passphrase support that unlocks countless extra wallets from the same seed words!
  • It knows how to understand transactions so you can see what you’re approving.
  • The first “ParSigned Bitcoin Transaction Format”-PSBT (GDP 174) native wallet, which can be used completely offline throughout the lifecycle.

New in version 2 of the Coinkite Goldcard

  • Physical buttons! Click click click click
  • Better energy management & ESD protection
  • Tempest anti-monitoring features for keypad scanning and power savings by removing touchkeys
  • More physical protection on sensitive tracks, which improves the safety between the safe element and the main microscope.
  • Boat security improvements: Includes updates to prevent und/or detect MiTM attacks.
  • “SHOOT THIS” markers for effective device destruction
  • Activity LED for MicroSD card slot
  • Only software improvements work on older devices.

The Coinkite Goldcard is different

NO special software required. It accepts standard PSBT transactions (GDP 174) stored on a MicroSD card. NO companion application on your computer necessary, already works with the main wallets (Electrum and more in preparation).

It’s cheap! Simple packaging, simple design, no fancy boxes, no redundant cables.

It’s ultra easy! Real crypto security chip. Your private key is stored in a special security chip, not in the flash of the main microkro.

Easy backup! MicroSD card slot for backup and data storage. This allows for real offline signing by transferring the unsigned transactions via the sneaker net.

Open source software design runs on micropython and you can change it.

Other features

  • The full-fledged numerical keyboard allows easy and quick input of the PIN.
  • Larger 128×64 OLED screen.
  • Sign text messages to prove control of the private key.
  • Join other signatories in multisig wallets.
  • Encrypn/decrypt secret messages (stored on MicroSD or otherwise).

 



FAQ 4

Ask your own question

That is not a problem. You can restore your accounts to a new hardware wallet using the recovery key you wrote down when you set it up.

Most wallets support more than just one cryptocurrency, but only generate one backup. Nevertheless, this one backup is sufficient to restore all cryptocurrencies as all private keys of the different wallets result from the seed that is backed up as a backup during setup.

Hardware Wallets such as the Ledger Nano X, TREZOR Model T, BitBox02 or KeepKey all work according to the same principle. They are a special form of a so-called wallet, which is used to manage cryptocurrencies. A hardware wallet is a physical device that securely and inisolationly generates the private keys to the cryptocurrencies. Due to the extra hardware, they have some advantages over software wallets:

  • private keys are often stored in a protected area of a microcontroller and cannot be transmitted in plain text from the device
  • immune to computer viruses stealing from software wallets
  • can be used securely and interactively, private keys never need to touch potentially vulnerable software
  • the software is open source in most cases, so that the user can validate the entire operation of the device.

However, it is important to understand that hardware wallets are a high-quality goal and depend on various assumptions that apply to maintaining security. They are not a miracle weapon, and there are several realistic ways to hack a hardware wallet Especially if someone has physical access to the device.

A new cryptocurrency is rarely supported directly by a hardware wallet at the beginning. However, most providers such as Ledger or TREZOR are constantly working to support new cryptocurrencies. Therefore, it is often worth waiting until the desired currency is supported by your hardware wallet.

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Product Specifications

CryptocurrenciesBitcoin
CompatibilityElectrum
BrandCoinkite
PlatformWindows, Linux, Mac
Altcoin Support
FIDO U2F Authenticator
Supported Coins1
Open Source
InterfacesUSB, microSD
Screen 2FA

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notes
You are welcome to leave pseudonyms or empty fields. Only the given data will be saved (comment, name, e-mail, website, no IP address). Further information on the processing of data and rights of objection are listed in the privacy statement.
notes
Für den Newsletter wird der Versanddienstleisters Mailerlite verwendet. Hinweise zu der von der Einwilligung mitumfassten Erfolgsmessung, Protokollierung der Anmeldung und deinen Widerrufsrechten erhälst du in der Datenschutzerklärung.




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