E-mail security. Conceptual image of e-mail security, showing a gold padlock above a computer landscape. On the padlock is an @ (meaning at") sign which is used in the addresses of electronic mail (e-mail). The padlock is being struck by lightning, representing computer 'hackers' trying to access secure information. It is important for users of e-mail and the internet to know that their information is secure. Financial transactions, confidential documents and products such as software are often communicated on e- mail. They can be protected by sophisticated security systems."