Digital signature
Maths that proves a message came from the holder of a private key, without revealing the key.
In plain English
Maths that proves a message came from the holder of a private key, without revealing the key.
When you send crypto, your wallet uses your private key to stamp the transaction with a digital signature. Anyone can check that stamp against your public key, but nobody can forge it without the private key.
It's the reason a blockchain doesn't need a bank to confirm who's who: the signature itself is the proof.
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