The portable terminal which decodes the encryption file where it is jointed by the encryption file management system and the manner and

摘要

PPROBLEM TO BE SOLVED: To enhance usability of file management of an encrypted file while securing its security. PSOLUTION: A mobile terminal which is connected with a network, and decrypts an encrypted file which is saved and requests user authentication by user operation, is provided with: a status measurement section; a user authentication information reqesting section; a recording section; and an encrypted file management section. The status measurement section measures a status of the mobile terminal and outputs the status information. The user authentication information requesting section requests a user the user authentication information according to the status information. The recording section saves the encrypted file. The encrypted file management section performs decryption of the encrypted file by the input of the user authentication information, the status information, and an approval result input from an authentication server when the user authentication information is corresponding to the status information, and when the user authentication information is approved by the authentication server. PCOPYRIGHT: (C)2010,JPO&INPIT