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Security Risks Preventions References
Security Risks
Computer Virus Worm Trojan Horse Adware Spyware Browser Hijacker Web Bug Email Hoaxes & Chain Letters Phishing
Security Risks - Computer Virus A small computer program that infects your
computer without permission or knowledge of the user
Infects others via a host media Floppy disk Email …
http://www.healthinitiative.org/IMAGES/virus_big.jpg
Security Risks - Worm
A self-replicating program, spreads across the Internet
May contain viruses 1st worm was created by Robert T. Morris, a
graduate student at Cornell U. in 1988 Computer Emergency Response Team
(CERT) was created as a result
http://tbn0.google.com/images?q=tbn:FuQHZgw5DccTfM:http://co.marion.or.us/NR/rdonlyres/481BF728-146C-49E6-8C61-3D79ADD691F2/5465/worm.JPG
Security Risks - Trojan Horse
A program that disguises itself to be something useful or harmless Eg. screensaver
In fact, a backdoor program which allows unauthorized access remotely
http://en.wikipedia.org/wiki/Image:Trojan_horse_%C3%87anakkale.jpg
Security Risks - Adware
An advertising-supported software
Security Risks - Spyware
Adware + collecting user’s information without the user’s consent
Security Risks - Browser Hijacker A program that changes the settings on the
web browser Change the homepage to other website
Security Risks - Web Bug
Originally, use 1x1 image embedded in web pages or HTML emails to keep track of users
AKA web beacon, tracking bug, … To avoid that:
Turn off image loading on email clients Use text-based email such as pine
http://www.prospexis.net/images/beatle2.gif
Security Risks - Hoaxes and Chain Letters Hoaxes are fake warnings, instructing you to
delete files, playing on your sympathy, etc Chain letters implore you to pass the
message to as many people as possible For examples
“This is not a hoax.” “Forward this email to 10 people you know for
good luck …” “VIRUS! DELETE NTFS.SYS”
Security Risks - Phishing
Security Risks - Phishing
Preventions
Use anti-virus/firewall software For examples
AVG (http://free.grisoft.com/) Nod32 (http://www.eset.com/) Norton Antivirus (http://www.symantec.com/)
Schedule auto-update
Preventions (cont)
Backup Use 2 HDs Burn CDs/DVDs and give them to your
mom Use online backup services
http://www.carbonite.com/
Be educated Don’t “fool” around
References
Internet Effectively Ch 1 Ch 4
Wikipedia http://www.wikipedia.com/
