1
Sam Rahman, Jim Magner, John Brown, Adarsh Pun, Grant Parker: Secure credit card which prevents unauthorized transactions. John J Connors & Associates Connors, December 26, 1995: US05478994 (211 worldwide citation)

A secure credit card 10 has a body member to which is attached a microprocessor controller 14 electrically coupled a Programmable Read Only Memory (PROM) device 18 programmed with a series of random numbers in a predetermined sequence. The random numbers are identical to random numbers in a host com ...


2
Sam Rahman, James Magner, John Brown, Adarsh Pun, Grant Parker: Transaction device, equipment and method for protecting account numbers and their associated personal identification numbers. John J Connors & Assoc Connors, May 6, 1997: US05627355 (138 worldwide citation)

Security equipment protects the relaying of account numbers and personal identification numbers (PIN) by telephonic or other communication link. The equipment includes a host computer an a remote portable transaction device that interact. A credit granting institution generates an account number and ...