Terminal device and computer program

Abstract

As a saving target file is specified, a controller (110) executes a file management program to divide the saving target file, encrypt a divided file using a cryptographic key corresponding to the logical address of the divided file, save the divided file at a storing destination corresponding to the logical address, and create a table associating the logical address, the cryptographic key, and the saving destination physical address. As a reading target file is specified, the controller (110) identifies the corresponding divided file from the logical address, identifies the saving destination physical address of the divided file and the cryptographic key with reference to the table, reads the divided file from the identified physical address, and decrypts the divided file using the identified cryptographic key.

Dependencies are inferred from the claim text.