Non-Repudiation

Non-repudiation is a concept in information security where the author of a statement or the creator of a transaction cannot successfully deny the validity of their action. In financial derivatives, this is achieved through the use of digital signatures, which provide cryptographic proof that a specific entity authorized a transaction.

Because only the holder of the private key could have generated the signature, the action is considered legally and technically binding. This principle is critical for market stability, as it prevents participants from attempting to renege on trades when market conditions move against them.

It ensures that every transaction on the ledger is finalized and authenticated, providing a clear audit trail for regulators and market participants. Without non-repudiation, the trust required for high-frequency trading and complex derivatives would collapse, as participants could claim their trades were unauthorized.