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Results tagged with signature
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user 49364
A digital signature proves that the owner of a private key produced or endorsed a given message. These are used in transactions to prove that an output can be spent in a transaction.
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Why is the signature hash different for each input in a multi-input transaction?
Varying the signature per input helps prevents some attacks during multi-party transaction construction.
Consider a coinjoin involving Alice and Bob. … Now Bob copies her signature, which would be valid for the UTXO of Alice's that he selected if SIGHASH_ALL were constant for all inputs. Now Bob has procured Alice's funds for himself. …
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