Security

What is Coldcard?

July 3, 2020

Bitcoin, Hodl, Cold Storage, Hardware Wallet, Security

⚠️ Critical random number generator vulnerability. Updated 2 August 2026.
A flaw was found in COLDCARD firmware: since 2021 the device silently used MicroPython’s software fallback generator instead of the hardware TRNG. On 30 July 2026, 594.48 BTC were swept from roughly five hundred addresses in a single burst.
Every model except the Mk1 is affected — Mk2, Mk3, Mk4, Mk5 and Q. Fixed firmware: 4.2.0 for the Mk3, 5.6.0 for the Mk4 and Mk5, 1.5.0Q for the Q.
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Starting with Mutiny Wallet

March 2, 2023

Bitcoin, Hodl, Private Keys, Security, Mobile Wallet, Lightning

Recently, I listened to an episode of SLP551 featuring a discussion between @stephanlivera and @benthecarman about Mutiny Wallet. Ben illustrated the straightforward process of getting started with Mutiny — merely sending a link connects you directly to the Lightning Network. I’ve been curious about Mutiny for a while now, so it’s about time I checked it out for myself. Let’s dive in and see what it’s all about.

This article by @runningbitcoin was published on stacker.news website.
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