Definition ∞ A transaction signature is a cryptographic proof that authorizes a digital asset transaction, verifying that the sender has legitimate ownership of the funds and intends to initiate the transfer. Generated using the sender’s private key, this signature is mathematically linked to the transaction data and can be publicly verified using the corresponding public key. It ensures the integrity and authenticity of the transaction, preventing unauthorized alterations or repudiation. This digital credential is fundamental to secure asset movement.
Context ∞ Transaction signatures are fundamental to the security and operation of all blockchain networks, frequently referenced in news regarding asset transfers, wallet security, and protocol design. Any compromise of the private key used to generate a signature leads directly to the loss of funds, underscoring its critical importance. Innovations in signature schemes, such as Schnorr signatures, are often reported for their potential to enhance privacy and efficiency.
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