Coinkite’s Substack

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Our affordable contactless [NFC] Bitcoin smart-card initiative.
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Excited to announce the Early Bird reservation of COLDCARD Mk4, get $40 off as many units as you’d like. Some of the improvements include: USB-C…
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Seed XOR – Split your secret BIP-39 seed into 2 or more new seed phrases Most people understand that metal seed backups are paramount, as paper burns…
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Enhancements Support “importdescriptors” command in Bitcoin Core 0.21 so that a descriptor-based wallet is created. PSBT files are then supported…
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Enhancements Shows QR code with BIP-85 derived entropy value if you press (3) while value shown on-screen. Thanks to @opennoms for idea. Works with…
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New feature: “Countdown to Brick” Set a special PIN code, and when used, the Coldcard is immediately bricked while a normal-looking countdown for login…
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All New Code, Same Great Features Major internal changes, which don’t really change features: Now using Bitcoin Core’s “libsecp256k1” for all EC crypto…
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Major Multisig Improvements! This release (3.2.2) is a major one for the Address Explorer and includes a number of much-asked-for features: View…
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Security Fix (Multisig Users) Version 3.2.2 fixes a security issue that could allow an attacker—who has compromised your computer during multisig wallet…
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The Aledged Problem One of our competitors (thanks Marko) identified a serious issue where some hardware wallets (including Trezor and Ledger) will sign…
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Major Performance Boosts! Massive Enhancement: Optimized and improved drawing speed on screen, and responsiveness of keypad presses. You’ll see some…
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