SYSTEM FOR PROTECTING INFORMATION AND METHOD THEREOF

摘要

PURPOSE: An information protection system encrypting or decrypting all transmitted and received communications signals by mounting an encryption module which delivers a key series in a mobile terminal and a method thereof are provided to perform exclusively key series operation and decryption of a stored security keylock, thereby simplifying the structure of an encryption device which performs the encryption and decryption of communications signals. CONSTITUTION: An encryption module is detected(S100). The encryption module delivers "C Req Dev ID" message to a mobile terminal(S101). The mobile terminal delivers "C Res Dev ID" message to the encryption module(S102). An encryption module performs authentication determining a normal terminal(S103,S104). The mobile terminal delivers "C Req Key" message to the encryption module(S105). The encryption module determines whether a detected PIN(Personal Identification Number) and a stored PIN are identical or not(S106). The encryption module performs the decryption of an encrypted security keylock by controlling a security keylock decryption part(S107). The encryption module delivers "C Res Key" message including a key series to the mobile terminal(S108). The mobile terminal performs secure communications(S109). [Reference numerals] (AA) Start; (BB,DD,FF,HH) No; (CC,EE,GG,II) Yes; (JJ) End; (S100) Detecting an encryption module?; (S101) Requesting an identifier of a mobile terminal; (S102) Delivering the identifier of the mobile terminal; (S103) Performing authentication of the mobile terminal; (S104) Mobile terminal authentication success?; (S105) Delivering a PIN number; (S106) Matching with the PIN number?; (S107) Performing the decryption of a security key; (S108) Generating and delivering a key series; (S109) Encrypting or decrypting a communication signal by using the key series; (S110) Increasing a PIN error count(+1); (S111) Is the PIN error count value over an error reference value?