Data erasure

Data erasure is the practice of destroying digital records. A fast but naïve approach is to simply make a record inaccessible by deleting an entry in a central index. However, more comprehensive methods involve repeatedly rewriting the recordʼs known physical data sector with noise and/or filling all (unused) data sectors in the entire storage medium with noise.

Useful commands

On a Debian Linux system:

$ sudo apt install secure-delete
$ sfill -l -l /some/dir/

See also

• Wikipedia:Data erasure

External links

• bk4, reboil.com