How Does ECDSA Prevent Transaction Repudiation in Blockchain?

Non-repudiation means a sender cannot falsely deny having sent a transaction. ECDSA achieves this because only the private key holder can create a valid signature for a specific transaction.

The verification process mathematically confirms that the signature corresponds to the public key and the transaction data. Since the private key is unique to the owner, a valid signature serves as irrefutable proof of authorization.

This is vital for trustless systems.