Apparatus and method for controlling file backup

According to the backup file in the backup storage device and a way to control so that the files stored in the backup storage are not infected by a malicious code, such as ransomware it is disclosed. According to an aspect of the invention, a device for controlling the backup of the file to the backup storage, identifying the files to be backed identification module; If there is no signature for the identified file signature generation module to add to the identified files to generate a signature of the identified files; When a signature existing in the identified file signature verification module to generate a signature from the identified file and compare signatures present in the identified file to verify the validity of the signature; And a backup processing module for storing the identified file succeeds to the identified file or the validation of the signature is added to the backup storage.