Bitcoin Arithmetic – Filling in the Blanks: Why Transactions Need Signatures
Imagine you draw a picture and sign your name on it so everyone knows it’s yours. In Bitcoin, every payment has a digital signature that proves it came from you. This signature is made with a secret key that only you have. Without the signature, no one would know the payment is real, and anyone could cheat. Signatures make Bitcoin safe and fair because they show who really sent the money without telling anyone your secret key.
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Block Height: 915390