4 more tips for workplace security:
13. Always shred classified information or use security waste containers
14. Never share your password – even if the service desk or your boss instructs you to do so
15. Delete old e-mails which are no longer required from time to time
16. When receiving an e-mail from an unknown sender, ask yourself: Does the subject make sense? Is there an instruction (social engineering) or (malicious) attachment?