Patent ID: 7836491

Claim:
A system for identifying a client, the system comprising a server and a portable communication device, wherein the portable communication device comprises: a switch for turning on the portable communication device; a nonvolatile memory for storing at least one reference biological information of the client using the portable communication device, the stored biological information being stored in the nonvolatile memory prior to turning on the portable communication device; a sensor for reading at least one biological information of the client after using the switch to turn on the portable communication device; a checking circuit for performing an identification process to confirm an identity of the client by checking the read biological information with the stored biological information, wherein the checking circuit is configured to complete the identification of the client if the read biological information matches with the stored reference biological information; and a transmitting circuit for transmitting information that the identification of the client is completed and the identity of the client is confirmed to the server, wherein the portable communication device is configured to complete the identification of the client without a necessity of exchanging data between the portable communication device and the server, and wherein the server is configured to transmit the information that the identification of the client is completed to a final end of transaction configured to start a transaction with the client conditioned upon receipt of the information that the identification of the client is completed, and wherein a personal identification number information is sent to the server after transmitting the information that the identification of the client is completed to the server, and the stored biological information is rewritable if the personal identification number matches with a number stored at the server and is not rewritable if the personal identification number does not match with the number stored at the server.