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COLDCARD Mk4 v5.4.2 & Q v1.3.2: Co-sign and Key Teleport

Summary by nobsbitcoin.com
Contribute to keep No Bullshit Bitcoin news going.The latest firmware updates for COLDCARD devices introduce two major features: COLDCARD Co-sign (CCC) and Key Teleport between two COLDCARD Q devices using QR codes and/or NFC with a website.What's new COLDCARD Co-Sign: When CCC is enabled, a second seed called the Spending Policy Key (Key C) is added to the device. This seed works with the device's Main Seed and one or more additional XPUBs (Bac…
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nobsbitcoin.com broke the news in on Saturday, April 19, 2025.
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