4
here's what i want to do:
store my private key on an offline phone. use that offline phone to generate a signed transaction and generate a QR code for me to scan/broadcast with my online phone.
does this exist?!? i cannot find an app to do it
seems like the most secure/convenient way to use bitcoins.
2
electrum android app can do this! check it out, it's perfect! also seems like a nice wallet with a lot of features.
your watch-only online electrum can create an unsigned transaction with QR code. your offline electron can scan then sign it & generate a QR code for you to broadcast with online electrum!
i recommend using multisig instead. same idea, just an extra level of security by also requiring the key from your online phone – Farzher – 2019-01-25T07:25:48.170
2Beware: phones are built for connectivity. To make a truly offline device you'll want to take extra steps to ensure you remove all connective functions (wifi, bluetooth, etc) from the device. Otherwise this is a reasonable idea, though I'm not sure what software is mobile-ready to display signed transactions in the way you need. – chytrik – 2018-07-03T19:15:22.447
that's a good tip. i thought even if i have 100 virus on my phone it won't matter because it'll never go online. but what if the virus re-enables online o.o
also i need to make sure to encrypt phone's data, just in case it's stolen there's no keys on the drive – Farzher – 2018-07-04T03:14:15.690