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if u desire a standard hardware signing device, blockstream Jade is a simple and affordable device. it can be paired with blockstream green wallet app which has lightning channel capability. the hardware works over blutooth, partial-signing transaction via QR & camera, or USB connection.
there are plenty of other cold-storage solutions. time studying them, cost, features, security, are all trade-offs.
u can tell ur daughter to go on https://darth-coin.github.io and start reading the beginner guides in the meantime. teenagers will pick this up quickly, and then summarize it for u. those guides are dense.
Great references and suggestions, thanks.
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I've been using a Ledger device, and I find it very simple and easy to use. However, I've heard that Ledger is now saying that if the government requests it, they will provide back door access to anyone's device. I have looked into ColdCard, but it seems a little complicated to me. I will check out your suggestions. Thank you.
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