US Patent 9390417 Mobile financial transaction system

A computer system enables users to conduct financial transactions in a secured manner without using traditional financial instruments. The computer system enables sending a pass code to a first personal communication device of a first user. The pass code has a predefined lifetime. The computer system also enables approving the financial transaction between the first user and a second user in response to receiving the pass code from a second personal communication device of the second user before the pass code expires.