Abstract: Provided is a method of and system for settling signatureless payment of a slip of bank card sales in a mobile terminal such as a cellular phone, a personal digital assistant, and a smart phone, having a mobile IC (Integrated Circuit) chip card, to then be printed on a transaction approval sales slip, to thereby make personal authentication completed and prevent the sales slip from being forged or fabricated, without signing on a customer's autographical signature of the sales slip. The signatureless payment settlement system has an algorithm for producing a personal authentication value in an IC chip card mounted on the mobile terminal including the cellular phone or PDA (Personal Digital Assistant), and receives a card issuing company key, card issuing information, a card password, an IC chip card produced random number to produce a personal authentication value.

Abstract: An optical payment transceiver and an optical settlement system using the same uses a personal portable terminal incorporated with an optical transceiver as a card substitute payment unit for settlement. Here, card information is incorporated in a personal portable terminal incorporated with an optical transceiver such as a portable phone or a PDA and the optical transceiver is connected to a card inquiry machine to thereby optically transmit and receive card information. The card inquiry machine recognizes the received card information in the same manner as that of the card reader reading a magnetic card, and transmits the card information to a VAN company server or a card company server, to then request for an approval and settle transactions.