How to import priv key bitcoin qt
In the Import section, the third sub-section option is Import using paper wallet. Just as it sounds, you can import with a private key but by using a QR code. Instead of typing in your alphanumeric private key, you can scan your QR code instead and import the private key that way.
This section keeps a running list of backups of your Blockchain Wallet. Every time there is a change in your wallet, a new backup is created. With the automatic backups, at any time you can import a previous wallet file. In this third section, Blockchain accepts wallets in different formats, with AES encrypted wallet backups being the most common and secure for Blockchain users. Just copy and paste your wallet backup data into this section to manually import your wallet backup. Make sure you have a full understanding of wallet backups before importing one.
This is just another method for Blockchain Wallet users to export their wallet private keys, using AES for more security, so at any time you can import them back to your Blockchain Wallet or any other wallet for that matter. As we always point out to our users, you control your bitcoins, nobody else. To repeat — there is no encryption — so the keys are in plain text and less secure when saved. This is fine, but something you should be aware of.
You can use this to create cold storage for your bitcoins, and also keep a paper trail in case you lose access to your passcodes to your wallet. To export the keys perform the following steps. With each private key copied to a text file, you are now ready to move onto the next step and claim your Bitcoin Cash. This step is optional but I highly recommend sending your full wallet balance to a new Bitcoin address where the private key will not be imported in the following steps.
The reason for doing this is to guarantee the creators of the Electon Cash wallet do not have access to your Bitcoin private keys and funds. Electron Cash is a fork of Electrum. The final step is to import the private keys used in the dumpprivkey command in the first step.
Remember to make sure you have sent the funds to a new Bitcoin address before importing the keys in the following steps. Open Electron Cash , give the wallet a name and then click Next. Select the Use public or private keys option and then click Next. Copy and paste the private keys you exported from the Bitcoin Core wallet and then click Next. Enter a password to encrypt the wallet file or leave blank to disable encryption then click Next.