Patent ID: 7987498

Claim:
A personal data management system comprising: a personal data storage medium; a terminal; and a server, wherein the personal data storage medium comprises: a first communication control unit configured to transmit and receive data to/from the terminal, the first communication control unit including a demodulating circuit, a modulating circuit, a decoding circuit, and a data judging circuit; an encoding unit configured to encode received data; and a nonvolatile memory configured to store the encoded data, wherein the terminal comprises: a second communication control unit configured to transmit and receive data to/from the personal data storage medium and the server; a display portion configured to display received data, and an input unit, and wherein the server comprises: a third communication control unit configured to transmit and receive data to/from the terminal; a decoding unit configured to decode encoded data; an identification data storage portion; and a comparison reference configured to compare the decoded data with data in the identification data storage portion.