SYSTEM AND METHOD FOR DISPLAYING OTP BY MULTIPLE CODE CREATION MODE WITH INDEX EXCHANGE, MOBILE PHONE AND RECORDING MEDIUM

摘要

PURPOSE: An output method of double code generating way through index exchange, a system of the same, a mobile phone for the same and a recording medium of the same are provided to authenticate whether the mobile phone is a valid OTP medium or not every time generating OTP through the mobile phone. CONSTITUTION: A server combines server side generation information matched with an index value among at least one server side OTP generating information about an OTP medium stored in a storing medium and received OTP when authenticating a mobile phone as an OTP medium. The server configures OTP generation information for generating N digits of OTP(460). The server generates N numbers of an OTP through the configured OTP generation information(465). The server transmits the generated N numbers of OTP to a mobile phone(470). The mobile phone receives and outputs N numbers of OTP(475).