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Rounding out the package is a versatile DIY JavaCard smartcard, shipped unlocked with default keys, ready for you to load applets directly via your SeedSigner. It's compatible with both contact and NFC interfaces for flexible use. This combination of SeedSigner and smartcards opens up powerful possibilities for bitcoin cold storage. Imagine signing transactions and verifying PSBTs offline using your Satochip or the included DIY card, all while maintaining air-gapped security. You can easily sign messages, export xpubs for single or multisig configurations, and integrate with address explorers for better oversight. With Seedkeeper from SatoChip, managing seeds, wallet descriptors, and secrets becomes straightforward—supporting Electrum-style seeds, split passphrases, and even encrypted QR codes for added layers of protection. Whether you're building a robust multisig setup or simply want more control over your offline storage, the Smartcard Hat Kit makes it simple and secure.
Get yours today and take your nostr:nprofile1qyx8wumn8ghj7cnjvghxjmcpz4mhxue69uhk2er9dchxummnw3ezumrpdejqqg8je9kf0ajpnffclpx087njugv5vp0psjqfdeh9zuxvukmk0xw5qqpfw6hy to the next level!
https://www.gobrrr.me/product/smartcardhat-kit/


