10.4. Task 10.4: Sanitizing Media

This task deals with discarding or reusing media, like paper documents, CDs, DVDs, old tapes from backup systems, and hard drives. Discarding or reusing this media is a potential security breach, unless the media has been successfully and completely purged of recoverable data.

There are times when you don't want to purge all data on a disk, but just the deleted files. When you delete a file off your computer, the filesystem doesn't actually remove the file from the disk. In the table of contents for the partition, it simply overwrites the first character of the filename with a question mark. This tells the filesystem that the space previously occupied by the file is now free space. The actual file content remains ...

Get Security Administrator Street Smarts: A Real World Guide to CompTIA Security+™ Skills, Second Edition now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.