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Is It Safe to Upload Private Key to Bitcore Walle

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Alarm

Before reading this page, users should note that messing with ECDSA private keys is very dangerous and can result in losing bitcoins, even long later the import. Information technology is recommended that outside of self-generated vanity addresses, users should never import (or consign) individual keys.[one] [ii]

Contents

  • 1 Using Blockchain.info
  • two Using BIPS
  • 3 Using Mycelium
    • 3.1 Partial spend from common cold storage
    • 3.2 Import cardinal from a paper wallet
  • four Using bitcoind
    • 4.1 Starting time Bitcoin client
    • iv.2 Unlock your wallet
    • iv.3 Import Private cardinal(s)
    • iv.4 Cleaning upwards
      • 4.four.ane Deleting Keys
    • 4.5 References

Using Blockchain.info

As of August 2012, perchance the easiest way to import a private key is using Blockchain.info's My Wallet service. When successully imported through the "Import/Consign" screen, the bitcoins assigned to a individual primal can exist immediately sent to any Bitcoin address. It is extremely risky and not recommended to employ Blockchain.info or whatsoever online 3rd-party service to import private keys, considering they can steal your BitCoins if they accept the keys. Information technology's best to import them using bitcoind as described beneath.

Using BIPS

As of Baronial 2013, BIPS.gif BIPS allows for easy import of private key using Newspaper Wallet - Import. User tin can cull to type in the private central manually or scan a QR code containing the private fundamental using the camera. The user must expect 6 confirmations for access to the funds, and organization is based on batch importation. It is extremely risky and not recommended to use BIPS or any online third-party service to import private keys, because they can steal your BitCoins if they have the keys. It's best to import them using bitcoind as described below.

Using Mycelium

Steps described are with the following settings:

  • Consign mode enabled
  • Aggregated view disabled

Partial spend from cold storage

Apply this office if you would like to go on some funds on the paper wallet.

  1. Download Mycelium from the Android Play Store or through iTunes.
  2. Press the menu push and select "Common cold Storage"
  3. Scan in private key
  4. Select your destination address
  5. Select the amount
    1. Press the blue currency tag at the top to toggle currency.
  6. Send!

After spending, the individual key in memory is destroyed so the paper private central remains somewhat secure. Despite this, best practice is to immediately transport the remaining balance to a paper wallet that was generated offline.

Import primal from a paper wallet

Use this function if you would like to import a private cardinal so all funds are immediately available for spending.

  1. Download Mycelium from the Android Play Store or through iTunes.
  2. Key Direction
  3. Press the bluish '+' symbol
  4. Scan in private primal

After importing this paper private fundamental, you might consider destroying the original so information technology cannot be institute and your funds stolen. Alternatively, y'all can go along it safe to be used as an offline backup.

Using bitcoind

If yous accept Version 7 or later information technology is now trival. Encounter: How to import private keys v7+

If you are using Common cold storage, a Paper wallet or generating vanity addresses y'all may accept a need to import a Private key. Since Bitcoin-QT/bitcoind v0.6.0, you can import private keys using built-in RPC command importprivkey. Earlier v0.half dozen.0, you lot needed to rely on tertiary-party wallet.dat manipulation tool such as Pywallet.


This commodity describes how to import a private key through the RPC API of bitcoind, which is a topic for advanced users.

Note that importing a central to bitcoind and/or Bitcoin-Qt may be dangerous and is non recommended unless you empathise the full details of how it works

Commencement Bitcoin client

Unlike third-political party wallet.dat manipulation tools such every bit Pywallet, you do not have to close the Bitcoin client earlier proceeding. Instead, you need to commencement the bitcoind server.

  • Close bitcoin-qt and start bitcoind -daemon in Concluding Emulator. The version of bitcoind MUST be the same as bitcoin-qt!

Bitcoin-QT does not enable its RPC interface past default. To enable information technology:

  • Close Bitcoin-QT and restart it with bitcoin-qt -server.

Unlock your wallet

If you take an encrypted wallet (recommended), you need to unlock it temporarily before importing individual keys. The RPC command for unlocking an encrypted wallet is walletpassphrase <passphrase> <timeout>. Typing this directly in a fustigate concluding will leave your wallet passphrase directly in the bash history just at that place are a couple of techniques y'all can use to avoid this. Simply add a infinite before the control: 

(space)bitcoind walletpassphrase yourpassphrase 120

Another alternative is to utilise a fustigate variable: 

read -s -p 'Blazon your passphrase: ' ten (input your passphrase) bitcoind walletpassphrase "$x" 120   # Do not set the timeout too long or too curt.

Import Private key(s)

The last command unlocked your wallet temporarily for 120 seconds, during which time you must import your private keys. Since private keys can be equally important equally your passphrase, you may desire to use the same techniques equally above to prevent their existence recorded in bash history (bash variable or space before the command): 

(space)bitcoind importprivkey "5yourveryveryveryverylongprivatekeystring" "my-new-cardinal"  # "my-new-central" is a label for the key/address pair and is optional

The importing process is now started. Bitcoind will rescan the entire block data to ensure this key has not been used before. This process will take from one to two minutes, depending on your CPU functioning. Practise NOT abort it before finishing!

To avoid rescanning run the following. 

(space)bitcoind importprivkey 5yourveryveryveryverylongprivatekeystring" "label-hither" rescan=simulated

If no errors occurs, the import is a success and Bitcoin-QT users will be able to see the new address in the GUI immediately. If you need to import more keys, only repeat the instructions above. At that place is currently no command to import a batch of private keys so yous volition need to await a minute or 2 for each central to be imported.

Cleaning up 

bitcoind walletlock

This will lock your wallet again (then yous don't accept to wait for timeout) 

unset x unset y

These commands volition clear the passphrase and private key from retention if you lot used the read technique. If you started bitcoind, yous volition need to stop information technology earlier Bitcoin-QT will start again: 

bitcoind finish

Deleting Keys

At some signal, you may wish to delete private keys from a wallet.dat file but every bit of version v0.6.0 of Bitcoin-QT/bitcoind, there is no RPC method available for this purpose.

References

  1. ↑ Bitcoin StackExchange - Why physician says importing individual keys is so dangerous?
  2. ↑ Bitcoin StackExchange - Why then many warnings about importing private keys?

rogersagempiesent1986.blogspot.com

Source: https://en.bitcoin.it/wiki/How_to_import_private_keys

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