N.H. Rev. Stat. Ann. § 382-A:4A-201

"Security procedure" means a procedure established by agreement of a customer and a receiving bank for the purpose of (i) verifying that a payment order or communication amending or cancelling a payment order is that of the customer, or (ii) detecting error in the transmission or the content of the payment order or communication. A security procedure may impose an obligation on the receiving bank or the customer and may require the use of algorithms or other codes, identifying words, numbers, symbols, sounds or biometrics, encryption, callback procedures, or similar security devices. Comparison of a signature on a payment order or communication with an authorized specimen signature of the customer or requiring that a payment order be sent from a known email address, IP address or phone number is not by itself a security procedure.