Bitcoin Forum
November 04, 2024, 05:28:06 PM *
News: Latest Bitcoin Core release: 28.0 [Torrent]
 
   Home   Help Search Login Register More  
Pages: [1]
  Print  
Author Topic: How to generate qr codes for address and private keys?  (Read 9831 times)
smeagol (OP)
Legendary
*
Offline Offline

Activity: 1008
Merit: 1005



View Profile
December 16, 2013, 09:39:50 PM
 #1

Is there a service which can convert plaintext addresses and private keys into qr codes?

Thanks
smeagol (OP)
Legendary
*
Offline Offline

Activity: 1008
Merit: 1005



View Profile
December 16, 2013, 09:50:14 PM
 #2

Is there a service which can convert plaintext addresses and private keys into qr codes?

Thanks


I found this: https://github.com/casascius/Bitcoin-Address-Utility

Is there an already compiled version?  I don't want to install the deps.
Rannasha
Hero Member
*****
Offline Offline

Activity: 728
Merit: 500


View Profile
December 16, 2013, 09:51:48 PM
 #3

You can use bitaddress.org, the "wallet details" tab lets you input a private key and it will generate a QR code.

Of course, to ensure more security, you can save the website to disk and disconnect the machine from the internet (or better yet, copy the saved page to an offline machine) before you input your private key.
MA5H3D
Member
**
Offline Offline

Activity: 99
Merit: 10


View Profile
December 16, 2013, 09:55:34 PM
 #4

brainwallet.org will do that among other things.
smeagol (OP)
Legendary
*
Offline Offline

Activity: 1008
Merit: 1005



View Profile
December 16, 2013, 09:56:59 PM
 #5

You can use bitaddress.org, the "wallet details" tab lets you input a private key and it will generate a QR code.

Of course, to ensure more security, you can save the website to disk and disconnect the machine from the internet (or better yet, copy the saved page to an offline machine) before you input your private key.

I already have a vanity address and a priv key, so I would like to convert that.
Rannasha
Hero Member
*****
Offline Offline

Activity: 728
Merit: 500


View Profile
December 16, 2013, 10:17:45 PM
 #6

You can use bitaddress.org, the "wallet details" tab lets you input a private key and it will generate a QR code.

Of course, to ensure more security, you can save the website to disk and disconnect the machine from the internet (or better yet, copy the saved page to an offline machine) before you input your private key.

I already have a vanity address and a priv key, so I would like to convert that.

Yes, you can do that with bitaddress.org. It does more than generate keys. Open the page, go to the "Wallet details" tab, input your private key and it will make the QR codes.
smeagol (OP)
Legendary
*
Offline Offline

Activity: 1008
Merit: 1005



View Profile
December 16, 2013, 10:44:01 PM
 #7

You can use bitaddress.org, the "wallet details" tab lets you input a private key and it will generate a QR code.

Of course, to ensure more security, you can save the website to disk and disconnect the machine from the internet (or better yet, copy the saved page to an offline machine) before you input your private key.

I already have a vanity address and a priv key, so I would like to convert that.

Yes, you can do that with bitaddress.org. It does more than generate keys. Open the page, go to the "Wallet details" tab, input your private key and it will make the QR codes.

Thank you!
empoweoqwj
Hero Member
*****
Offline Offline

Activity: 518
Merit: 500


View Profile
December 17, 2013, 09:49:22 AM
 #8

You can use bitaddress.org, the "wallet details" tab lets you input a private key and it will generate a QR code.

Of course, to ensure more security, you can save the website to disk and disconnect the machine from the internet (or better yet, copy the saved page to an offline machine) before you input your private key.

I already have a vanity address and a priv key, so I would like to convert that.

Yes, you can do that with bitaddress.org. It does more than generate keys. Open the page, go to the "Wallet details" tab, input your private key and it will make the QR codes.

I second that. Bitaddress.org is excellent and easy to use.
Altoidnerd
Sr. Member
****
Offline Offline

Activity: 406
Merit: 251


http://altoidnerd.com


View Profile WWW
September 08, 2015, 05:28:00 AM
 #9

Using the new bitcoin-core binaries in linux (be sure you have qrencode installed):

Code:
addr=$(./bitcoin-cli getnewaddress) && ./bitcoin-cli dumpprivkey $addr| qrencode -o ~/Desktop/$addr.privkey.png && echo "private key dumped for: "$addr

See http://altoidnerd.com/2015/09/06/how-import-a-bitcoind-address-private-key-into-breadwallet-ios-with-a-qr-code-using-bitcoin-core-for-ubuntu-linux/

Keep in mind the above snippet generated a new address.  You can use and address you have in mind e.g. "address":

Code:
addr="address" && ./bitcoin-cli dumpprivkey $addr| qrencode -o ~/Desktop/$addr.privkey.png && echo "private key dumped for: "$addr

Or if you have the private key as a string = "privkey":

Code:
key="privkey"; echo $key | qrencode -o ~/Desktop/mykey.png && echo "private key qr mykey.png created for $key


Do you even mine?
http://altoidnerd.com 
12gKRdrz7yy7erg5apUvSRGemypTUvBRuJ
Pages: [1]
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2006-2009, Simple Machines Valid XHTML 1.0! Valid CSS!