Apparatuses, systems, methods, and computer readable media for providing secure file-deletion functionality
A secure file-deletion function providing apparatus includes a request input unit configured to receive a file deletion request to delete a file stored in an apparatus from a user; a file deletion unit for deleting the file included in the file deletion request, and a secure file-deletion unit for overwriting a region including a region that stores the file with a dummy value in order to make it more difficult and/or impossible to recover the file deleted by the file deletion unit.
1. A method of securely deleting a file, the method comprising:
receiving, using at least one processor, a file deletion request, the file deletion request including file information of a desired file to be deleted that is stored on a storage device of an apparatus;
replacing, using the at least one processor, content of original data of the desired file with a first desired value;
deleting, using the at least one processor, the desired file associated with the file information;
overwriting, using the at least one processor, a storage region of the storage device with the first desired value, the storage region including a location that stores the desired file;
calculating, using the at least one processor, a size of an available storage space on the storage device after deleting the desired file;
creating, using the at least one processor, a second file having a size based on the calculated size of the available storage space;
deleting, using the at least one processor, the second file,
storing, using the at least one processor, a third file including a second desired value in a same directory as a directory that stores the desired file on the storage device; and
deleting, using the at least one processor, the third file.
2. The method of claim 1 , further comprising:
creating, using the at least one processor, a first file having a size based on a size of the desired file; and
deleting, using the at least one processor, the first file.
3. The method of claim 1 , further comprising:
creating, using the at least one processor, a first file having a same filename as the deleted desired file; and
deleting, using the at least one processor, the first file.
4. A non-transitory computer-readable recording medium having stored thereon a computer program, which when executed by at least one processor, causes the at least one processor to perform the method of claim 1 .
5. An application distribution system comprising:
a memory having computer readable instructions stored thereon; and
at least one processor configured to execute the computer readable instructions to,
transmit an application to a terminal, and
the application, when executed, configures the terminal to,
receive a file deletion request, the file deletion request including file information of a desired file to be deleted that is stored on a storage device of the terminal,
replace content of original data of the desired file with a first desired value,
delete the desired file associated with the file information,
overwrite a location of the storage device in which the desired file is stored with the first desired value,
calculate a size of an available storage space on the storage device after deleting the desired file,
create a second file having a size based on the calculated size of the available storage space,
delete the second file,
store a third file including a second desired value in a same directory as a directory that stores the desired file on the storage device, and
delete the third file.
6. The application distribution system of claim 5 , wherein the terminal is further configured to:
create a first file having a size based on a calculated size of the desired file; and
delete the first file.
7. The application distribution system of claim 5 , wherein the terminal is further configured to:
create a first file having a same filename as the deleted desired file; and
delete the first file.