Northland Security Systems

erosjellySecurity

Feb 23, 2014 (3 years and 8 months ago)

155 views

Northland
Security Systems

Computer
Viruses

Types of Viruses


Nuisance Viruses


Data
-
Destructive Viruses


Espionage Viruses


Hardware
-
Destructive Viruses

Methods of Operation


E
-
Mail Viruses


Macro Viruses


Boot Sector Viruses


Trojan Horse Viruses


Stealth Viruses


Polymorphic Viruses


Logic (Time) Bombs

Virus Symptoms


Files become corrupt


Program does not operate properly


Programs or files vanish


Strange messages appear on monitor


Less memory or disk space available


A disk or volume name has changed


E
-
mail message appears repeatedly

Security Strategies


Data backup


Disaster recovery plan


Data encryption


User IDs and passwords


Biometric authentication


Network sniffers


Mini Webcams


Firewalls