"Security procedure" means a procedure established by agreement of a customer and a receiving bank for the purpose of:
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, 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 a payment order to be sent from a known email address, IP address or telephone number is not by itself a security procedure.
13 Pa.C.S. § 4A201