PURPOSE: A sensitive keyboard for a sensitivity information service, a system and method for servicing sensitive information are provided to supply a sensitive keyboard which displays sensitive information and a sensitive information service for making a communication of a clear conversation possible through exchanging information including sensitive information additionally. CONSTITUTION: A server(1) includes a sensitive information database(3) for storing and managing sensitive contents of a sensitive information service being requested by a client(5). A client account management system(4) manages a connection and an account of the client(5), and manages a charge calculation process valid/invalid account by referring to data from a client authentication information database(6). The client account management system(4) is linked with a server(7) of other company business cooperation company which supplies sensitive contents, and may manage a client account. If the client(5) connects to the server(1) through the client account management system(4) and a client authentication is passed, a client job management system(2) charges a request management of sensitive information from each client(5). If sensitive information is requested through the above processes, the client(5) downloads sensitive information from the server(1), and the sensitive information is automatically installed in the client(5).
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