A completely innocuous file

One of your executives has asked you to remove a sensitive file from your server, and the removal must not be reversible. What is the most efficient and effective way to ensure that this file cannot be recovered?

A) Format the entire volume and reload the data

B) Use a secure file delete utility

C) Remove all permissions from the file and delete it normally

D) It’s not possible; files can always be recovered from disk

E) This might be a good time to ask for that raise

The answer: B) Use a secure file delete utility

There are many utilities that can securely delete individual files, including sdelete from Microsoft’s Sysinternals library.

Want to know more? Watch “Security Fundamentals.”

There are fundamental security techniques that every CompTIA A+ certified professional should know. In this video, you’ll learn about encryption technologies, data wiping, authentication technologies, and much more.