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Bitcoin Forum > Bitcoin > Development & Technical Discussion (Moderators: gmaxwell, achow101) > How to get Public Key from Wallet Address
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rubberpool
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June 10, 2014, 08:05:36 PM
 #1
Hello

I am looking for a way to get public key by knowing a wallet address. Can somebody help me? Thanks!
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June 10, 2014, 08:13:09 PM
 #2
Address is a hash of a public key - you cannot get it out from it just like that.
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June 10, 2014, 08:53:24 PM
 #3
If you have the private key, you can get the public key.

If bitcoins that were received at that address have ever been sent elsewhere, then you can find the public key in the blockchain.

If you have any message that was signed using the private key from that address, then you can get the public key from the signature.

If all you have is the bitcoin address, then it is not possible to get the public key.
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June 10, 2014, 09:33:27 PM
 #4
Quote from: rubberpool on June 10, 2014, 08:05:36 PM
Hello

I am looking for a way to get public key by knowing a wallet address. Can somebody help me? Thanks!

I've been trying to find a way to do this too.  Please PM me if you found a way Smiley
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DannyHamilton
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June 10, 2014, 09:36:46 PM
 #5
Quote from: hashman on June 10, 2014, 09:33:27 PM
Quote from: rubberpool on June 10, 2014, 08:05:36 PM
Hello

I am looking for a way to get public key by knowing a wallet address. Can somebody help me? Thanks!

I've been trying to find a way to do this too.  Please PM me if you found a way Smiley

PM sent.
https://21.co/dannyhamilton/

My Merit sending policy: https://bitcointalk.org/index.php?topic=2822212.0
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June 11, 2014, 04:31:36 AM
 #6

If that address was ever spent from the public key will show up at blockexplorer.com .
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ganabb
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June 11, 2014, 10:27:11 AM
 #7
A Bitcoin address includes a hash of the Public Key and a checksum to prevent mistypes from being accepted as valid addresses. The Public Key is disclosed when you spend Bitcoin from an address but not when you receive Bitcoins to that address.
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instagibbs
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June 11, 2014, 12:46:58 PM
 #8
You can only find it if someone has used it on the blockchain, and spent those satoshis. Or you generate it completely randomly yourself(good luck)
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