Signature
cryptography
A cryptographic proof that a message was authorized by the holder of a private key.
1.definition
A digital signature proves that the holder of a private key authorized a specific message and that the message was not changed after signing. Verifiers use the matching public key; they do not need the private key.
2.crypto-context
In Bitcoin-like systems, transaction signatures commit to selected transaction data according to sighash rules. Signature schemes such as ECDSA and Schnorr have different properties, but both depend on secure private-key storage and correct nonce handling.
Related terms
Private Key
→A secret number used to sign transactions and prove permission to spend.
cryptography · security · wallet
Public Key
→Cryptographic data used to verify signatures made by the corresponding private key.
cryptography · technical
Schnorr Signatures
→A digital signature scheme with linear properties that can improve verification, multi-signature design, and privacy.
bch · scaling
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