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Viruses. Viruses, Trojans, Worms. Virus - a program that attaches itself to a host, and copies itself onto new files/disks Macro viruses - small program written using a macro language for a specific program that executes when a document is opened.
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Viruses, Trojans, Worms • Virus - a program that attaches itself to a host, and copies itself onto new files/disks • Macro viruses - small program written using a macro language for a specific program that executes when a document is opened. • Trojan horse - a program that slips into the system using a disguise (a game, screen saver) • Worm - like a virus, but it reproduces and works over networks • Some are harmless, but many are destructive.
Avoiding Viruses, Worms, etc. • Use antivirus software and update it regularly • Keep floppy disks out of your floppy drive unless you are working on them. • Consider disabling Java and Javascript capabilities on your Web browser • Back up files • Disconnect your computer from Net when done. • Do not open “strange” email attachments
Avoiding Viruses, Worms, etc. • Viruses and email • You cannot get a virus from a plain text message. • Attachments can carry viruses or be a trojan horse • Save attachments to the hard drive before you open it. • See p. 62 for helpful tips for setting up mailer programs to save files automatically • Do not take the filename by face value. • Delete unexpected attachments
