4

Can I recover btc sent to an incorrect address? Confirmed Bitcoin transactions cannot be cancelled, reversed, undone or recovered. The only person who can give you your money back is the recipient, by creating a new transaction to send the same amount back to you. I realize now that I had a malware copy of electrum If the initial mishap was due to a ...


2

Yes, this happens when the same key is used perform multiple signatures with the same R value - simply using the same key for multiple, sanely produced signatures with a different R value will not result in leakage, no matter how many such signatures you make. Modern wallets use a deterministic nonce via RFC 6979.


2

No sane application should EVER attempt to validate a private key by attempting to pass it to an external API. That's a ridiculously easy way to lose all your funds if the API operator is malicious, compromised, or someone is eavesdropping on your communication with said API. You should do this yourself, preferably using a well tested, community supported, ...


1

Unused addresses are unrelated to mining activity. Even if you were mining, you will still see many unused addresses. The Bitcoin earned from mining would be associated with a used address. Bitcoin Core by default will generate 1000 (previously 100) unused keys to be used in the "keypool". The keypool is the pool of unused keys and is used as a ...


1

A private key is retrievable if two different messages are signed using the same r value and the same private key. Two signatures using different values for r are insufficient to recover a private key. You are asking for help to break one of the core cryptographic assumptions that make Bitcoin work. If what you are trying to do were possible, ECDSA would be ...


Only top voted, non community-wiki answers of a minimum length are eligible