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September 24, 2015, 07:10:38 AM |
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Hi again!
I am going to buy a couple more of BTC, and invest in it on monthly basics. Until now, I am using Bitcoin Core on my local PC and some lightweight wallet on my smartphone, but as I would like to hold bigger amount of BTC for a longer period of time, I am concerned about safety.
My idea is to buy an old laptop, that will be completely offline (turned-off/unplugged LAN devices). I'd use it to keep my private key and sign transaction with. I would communicate with it only with USB stick to migrate signed transactions outside. Private key would be offcourse saved on a paper copy(ies) as well.
Questions: 1. Is this do-able? If so, how can I sign transaction on an offline machine? Which tools should I use? 2. Could I do it with a tablet as well? Do you knwo any tools? 3. Do you see any security issues with this approach? 4. Do you know any tricks, to make paper copy of PK more secure? Less readable?
And yes, I did consider Trezor, but I decided to do it the other way.
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