import hashlib import hmac message = 'timestamp="2014-01-01 12:00:00.133";cardToken="14010112001asdklfjasldkfjasx1111";iin="444433";last4digits="1111";expirationMonth="12";expirationYear="2020";brandCode="Visa"' SECRET_KEY = 'F82EFA4A5AC542FD61ED26173543A1776D07C47D9935D05AEB168BF637AAC687' ticket_signature = hmac.new(bytearray(SECRET_KEY, "ASCII"), bytearray(message, "ASCII"), hashlib.sha256).hexdigest() print(ticket_signature)