If you become aware of following Security Related Terms then, you will be 100 steps ahead in computer security.
Back door
Bot,
Botnet,
Cracking,
Data diddling,
Data leakage,
Denial of service,
Distributed DoS attack,
DNS cache poisoning,
Easter egg,
Exploit,
Hacking,
Hacktivism,
Hoax,
Identity theft,
Impersonation,
Latency,
Logic bomb,
Mail-bombing,
Malware,
Master Program,
Payload,
Penetration,
Piggybacking,
Pharming,
Phishing,
Root kit,
Sabotage,
Salami theft,
Scavenging,
Scripts,
Simulation,
Social Engineering,
Spamming,
Spim,
Spit,
Spoofing,
Superzapping,
Time Bomb,
Trojan horse,
Vandalism,
Virus,
Vulnerability,
Wiretapping,
Worm,
Zombie