Definition ∞ Signature retraction refers to the act of invalidating a previously issued digital signature, typically before it has been processed or fully confirmed on a blockchain. This mechanism might be implemented to cancel an unintended transaction or to address a security vulnerability. The ability to retract a signature is usually conditional and protocol-specific. This feature offers a limited window for correcting errors.
Context ∞ The concept of signature retraction is a nuanced area in blockchain design, balancing user control with the immutability principles of distributed ledgers. While offering a safety valve, it also introduces complexities regarding transaction finality. Discussions often concern the precise conditions and timeframes under which such retractions are permissible, impacting system predictability.
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