This document provides a snapshot of security concepts for wanna-be hackers. It outlines topics like security policies, types of attackers (hackers, crackers, script kiddies), types of attacks (scanning, sniffing, brute force, denial of service), and malware (viruses, worms, trojans). It also discusses physical security measures, network security including authentication and authorization, and potential losses from security breaches like data loss, financial loss, and legal action. The document concludes with references and contact information for questions.