<p>No, there is no way to get the private key from a signature.</p>

<p>But someone (person B) could force you to sign a special message so that person B can pretend to person C to own that amount of bitcoins.</p>

CC BY-SA 3.0
2018-03-16T14:06:34.857Z
2018-03-31T17:34:38.740Z
2018-03-31T17:34:38.740Z
hardfork
<blockquote>
  <p>My question is if one shares bitcoin address and signature is there any risk of a attacker to compute the private key with this knowledge</p>
</blockquote>

<p>While signing, the public key becomes exposed. The primary assumption is "It's impossible to find the private key which relates to a known public key", and this assumption isn't likely to be disproved (in other words, cracked) in the next 10 years.</p>

<p>The process of signing a message to claim airdrops is absolutely safe, as you can move your coins to a different address after claiming your airdrops.</p>

<p>The only risk is your privacy: They'll know how much money you have. If that's an issue, you can just mix your coins after you're done.</p>

CC BY-SA 3.0
2018-03-16T14:13:22.503Z
2018-03-16T14:13:22.503Z
MCCCS
<p>Some bitcoin airdrops are asking to prove ownership on bitcoin address by sharing signature. </p>

<p>My question is if one shares bitcoin address and signature is there any risk of a attacker to compute the private key with this knowledge.</p>

<p>Note I am using electrum wallet to generate the signature</p>

<bitcoin-core><wallet><address><electrum><signature>
Is it safe to share bitcoin address and signature generated from electrum wallet
ron paul
# Is it safe to share bitcoin address and signature generated from electrum wallet

(Asked by: username_0 on 2018-03-16)

Some bitcoin airdrops are asking to prove ownership on bitcoin address by sharing signature.

My question is if one shares bitcoin address and signature is there any risk of a attacker to compute the private key with this knowledge.

Note I am using electrum wallet to generate the signature

**Tags:** bitcoin-core, wallet, address, electrum, signature


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## 2 answers

### Answer by username_2 on 2018-03-16. Score: 4 | Accepted answer

> My question is if one shares bitcoin address and signature is there any risk of a attacker to compute the private key with this knowledge

While signing, the public key becomes exposed. The primary assumption is "It's impossible to find the private key which relates to a known public key", and this assumption isn't likely to be disproved (in other words, cracked) in the next 10 years.

The process of signing a message to claim airdrops is absolutely safe, as you can move your coins to a different address after claiming your airdrops.

The only risk is your privacy: They'll know how much money you have. If that's an issue, you can just mix your coins after you're done.


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### Answer by username_1 on 2018-03-16. Score: 3

No, there is no way to get the private key from a signature.

But someone (person B) could force you to sign a special message so that person B can pretend to person C to own that amount of bitcoins.


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