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Northland Security Systems

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

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Northland Security Systems

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  1. NorthlandSecurity Systems

  2. Computer Viruses

  3. Types of Viruses • Nuisance viruses • Data-destructive viruses • Espionage viruses • Hardware-destructive viruses

  4. Methods of Operation • E-mail viruses • Macro viruses • Boot sector viruses • Trojan Horse viruses • Stealth viruses • Polymorphic viruses • Logic (time) bombs

  5. Virus Symptoms • Files become corrupt • Program does not operate properly • Programs or files vanish • Strange messages appear on monitor • Less memory space available • A volume name has changed • E-mail message appears repeatedly

  6. Security Strategies • Data backup • Disaster recovery plan • Data encryption • User IDs and passwords • Biometric authentication • Network sniffers • Mini webcams • Firewalls

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