Sometimes there is a need to impart confidential information online. You may have to give someone your bank account details, or send something private. Without encryption in place, you never know who could intercept the information, and what they could do with it. Using a program such as GNU Privacy Guard for Windows (GPG4win) encrypts files and emails, adding a digital signature to show that the message was sent by someone specific, and hasn’t been tampered with. This sort of protection is vital for large businesses who may email employees, clients or customers, but can also be used in the home to keep any sensitive information that may be sent safe.