PURPOSE: An electronic bankbook system and a financial service method using the electronic bankbook system are provided to more safely manage the personal financial information of a user and financial service by using a coding technique. CONSTITUTION: An electronic bankbook system includes an electronic bankbook client(101),and a server(106). The client(10) has a web browser(102), an SSL coding/decoding module(103), a browser linking module(104), and a data managing module(105). The server(106) has a cyber bank server(107). The web browser(102) receives a finance service request paper and Hyper text Markup Language HTML to which a field value is inserted from a user and the browser linking module(104), respectively. This browser(102) transmits the request paper and HTML to the SSL coding/decoding module(103).
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