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What is Signature?
Crypto Glossary Definition
Information that allows someone to prove that they have a private key, without having to reveal the actual private key.
Why Signature Matters
A digital signature cryptographically proves that a transaction was authorized by the holder of a specific private key, without revealing the key itself — it's the mechanism that lets a blockchain verify "this person really did approve this transfer" without any central authority vouching for it.
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