초록 ▼

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

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 a series of unique personal identification numbers for each account number. This information is stored in the host computer\s memory and is assigned as a reference series to an individual customer account number. An identical series of numbers in the same sequence is stored in the memory of the remote device. In operation, the customer account on the host computer is activated and the host computer\s memory is indexed sequentially to the first number in the reference series. During the use of the remote device, a unique personal identification number is added to the customer account number and transmitted to the host computer. There it is compared to the account number and personal identification number in the reference series. The computer will authorize the transaction if the number in the stored series is identical the number in the reference series. Otherwise the transaction will be denied or questioned.

대표청구항 ▼

A secure credit card including a body member including a memory element in which is stored a series of unique numbers in a predetermined sequence, said unique numbers being identical to numbers stored in a memory of a host control computer and in the identical sequence as the numbers in the host com

A secure credit card including a body member including a memory element in which is stored a series of unique numbers in a predetermined sequence, said unique numbers being identical to numbers stored in a memory of a host control computer and in the identical sequence as the numbers in the host computer, said host computer being accessible upon each use of the credit card, said memory element accessing the next number in sequence with each use of the credit card to permit verification by comparing the number provided by said memory element upon each use of the credit card with the next number in sequence as indicated by the host computer, a switch actuated with each use of the credit card to activate the memory element to provide the next number in the sequence, a counter which counts each use of the credit card, and a display device in the body member connected electrically to the memory element, said display device displaying the next number in the sequence with each use of the credit card.