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如何安全支付Bitcoin

如何在使用冷钱包的情况下安全支付比特币

硬件

  • COLDCARD: 冷钱包
  • MicroSD Card: 用于airgapped的签名(以确保整个过程完全不联网)

软件

  • Sparrow
  • GPG Keychain Tool

更新Firmware

  1. 官网指南
  2. 下载最新firmware
  3. 确认以下
  4. Confirm the Hash 
    shasum -a256 ~/<fireware下载路径>/20...-coldcard.dfu
    确保output的hash和signature的hash一致, 一致的话意味着firmware在transfer过程中没有被修改过。
  5. Verify PGP Signature 
    gpg --verify ~/<签名的下载路径>/signatures.txt
    确保看到"Good signature from "Peter D. Gray peter@coinkite.com"的字样。
  6. 用MicroSD card把新的firmware .dfu 文件安装到coldcard上
  7. 更新后ColdCard会再次要求输入PINs，记得确认firmware的version。

安全支付Bitcoin

尽可能使用Airgapped的方式，确保COLDCARD永远不和联网的机器连着。MicroSD card当中间人。

  1. 打开Sparrow
  2. Click Send
  3. Fill in Pay to, Label, Amount details
  4. Create transaction
  5. Finalize Transaction for Signing
  6. Save transaction to MicroSD card
  7. move to COLDCARD
  8. (remember to enter passphrase if you had one BIP39)
  9. Ready To Sign
  10. shoudl expect Reading... then Validating...
  11. confirm if transaction looks correct
  12. a -signed.psbt file should be created by then
  13. 把MicroSD插回电脑上
  14. Load Transaction
  15. Select the PSBT file and open
  16. Broadcas Transaction now.
  17. will take some time before the transaction is confirmed.