#coldcard

The new COLDCARD improves upon the Mk4 by adding a QWERTY keyboard, a big LCD screen, and a QR code scanner. Bitcoin hardware company Coinkite is launching a new higher-end COLDCARD, featuring a full QWERTY keyboard, a larger LCD screen and a QR code scanner. The COLDCARD Q1 will also be battery-powered, removing the need for connecting the device to a power outlet or a computer. “We always…

How to Secure Your Bitcoin With Self Custody

Coldcard is the maximalist cypherpunk wallet of choice for Bitcoin. It’s basically a small computer that does only Bitcoin. It’s almost impossible to hack, as it never connects over the internet. There are contingencies and safety tricks like a PIN that bricks the device forever. But for now, learn how to secure your bitcoin. Guide from the excellent resource…

‘Bypass’ Attack in Coldcard Bitcoin Wallet Could Trick Users Into Sending Incorrect Funds

The bitcoin-only hardware wallet Coldcard has released a beta firmware patch for a vulnerability that also affected a competitor hardware wallet earlier this year. Ben Ma, a security researcher who works for hardware wallet manufacturer Shift Crypto, discovered that the Coldcard hardware wallet has a flaw: An attacker could trick a Coldcard user into sending a real bitcoin transaction when they…

Bitcoin Wallet Reviews: What’s the Best Hardware Wallet on the Market? Part 3

This is the third article in a three-part series that examines five of the most popular Bitcoin hardware wallets. Read the first part, focused on the wallets’ physical safety and outward appearance here. Read the second part, focused on simplicity, accessibility and privacy, here. By request, samples were provided by some of the companies for review purposes.

After assessing the physical…

Bitcoin Wallet Reviews: What’s the Best Hardware Wallet on the Market? Part 2

This is the second article in a three-part series that examines five of the most popular Bitcoin hardware wallets. Read the first part here. By request, samples were provided by some of the companies for review purposes.

There are multiple reasons why the user interface recommended, developed or provided by hardware wallet manufacturers is important. 

First of all, depending on the nature of this…

Video Review: Coldcard Mk3

In the video above, Bitcoin Magazine reviewed Coinkite’s Coldcard Mk3 bitcoin hardware wallet, evaluating it with a handful of important criteria, including coin control, UTXO selection, Lightning support and more.

Appearance and Feel

As the second version of Coinkite’s hardware wallet, the Mk3 feels almost identical to the earlier model. It features the same full-sized numeric keypad that you…

Video Interview: Rodolfo Novak on the Coldcard Wallet and Opendime

Rodolfo Novak (also known as NVK) is a bona fide representative of the so-called “toxic Bitcoin maximalist” culture. And as an early BTC adopter, he is very much aware of the various security threats involved in holding desirable and scarce digital assets whose transactions are irreversible. Correspondingly, after becoming disillusioned with hardware wallet manufacturers such as Ledger and…