 Nuisance viruses  Data-destructive viruses  Espionage viruses  Hardware-destructive viruses.

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Presentation transcript:

 Nuisance viruses  Data-destructive viruses  Espionage viruses  Hardware-destructive viruses

 viruses  Macro viruses  Boot sector viruses  Trojan Horse viruses  Stealth viruses  Polymorphic viruses  Logic (time) bombs

 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  message appears repeatedly

 Data backup  Disaster recovery plan  Data encryption  User IDs and passwords  Biometric authentication  Network sniffers  Mini webcams  Firewalls

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