5

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.

| improve this question | |
  • 2
    Beware: 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 Jul 3 '18 at 19:15
  • 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 Jul 4 '18 at 3:14
3

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!

| improve this answer | |
  • i recommend using multisig instead. same idea, just an extra level of security by also requiring the key from your online phone – Farzher Jan 25 '19 at 7:25

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.