Slides from the latest presentation given by Martin Limburnfrom Limbtec, at plymouths Breakwater networking Group

2. Computer Security

3. Going to Cover
• Hardware
• Software
• Malware
• Spam
• Physical Security
• Questions?

4. Hardware
• Firewall
• Unified Threat Management Device

5. Software
• Firewall
• Anti-Virus
• Anti-Spyware
• Anti-Spam

6. • Virus
• Trojan
• Worm
• Other Malware
Malware

7. • Where are the threats from
– Russian Mafia
– Triads
• When
– Websites (upto 80% of legitimate websites are infected
1in 150)
– P2P Software (Limewire)
• How?
– You may see a pop up
– You may see nothing
Where, When, How will I Know

8. Research by Kaspersky Lab in 2010 suggests that 1 in
every how many legitimate websites is infected by
malware?
50%
25%
20%
5%
0%
10%
20%
30%
40%
50%
60%
12 150 275 No response
PercentageofRespondents

9. • Payload
– Trojan
– Key Logger
– Browser Hijack
What happens

10. • Sorry I personally don’t believe you are.
– Apple’s penetration of the market
– The lack of security Products
• My advice is protect your mac now, by
installing a 3rd Party Anti-Virus product
I’m Safe I use a Mac

11. • unsolicited or undesired bulk electronic
messages. There are many types of electronic
spam.
• 50 – 80 % of all emails are Spam.
• Possibly used as a delivery method for Viruses,
worms etc.
• Using Bandwidth.
• Waste of Storage.
SPAM

12. Percentage of emails sent in April 2011 were classified
as SPAM?
5%
35%
50%
10%
0%
10%
20%
30%
40%
50%
60%
16.8% 58.7% 72.9% No response
PercentageofRespondents

13. • Use an effective anti – spam tool
– Piece of software installed locally
– Carried out at your ISP
– Or through a hosted service
• When using an address publically, use a
different address
• Hide email addresses in websites.
Spam – what you can do!

14. True or false – to stop receiving spam you should
always click the ‘unsubscribe’ link in the email?
15%
75%
10%
0%
10%
20%
30%
40%
50%
60%
70%
80%
TRUE FALSE No response
PercentageofRespondents

15. • Network Devices (Routers, Switches etc.)
• Hard Drive Failure
• End Result of Virus
• Accidental deletion
Physical Security

16. According to IDC statistics, what percentage of
businesses that suffer a major data loss cease trading
within 12 months?
45%
15%
25%
15%
0%
5%
10%
15%
20%
25%
30%
35%
40%
45%
50%
Up to 30% Up to 50% Up to 70% No response
PercentageofRespondents

17. Any Questions?

18. • These measure can be thought of those similar to the ones we carry out on our cars (checking
lights, fluid levels etc.)
• Get information about what's new
• Sign up to receive notification when patches are available for the software you have
installed. You can usually do this by going to the manufacturer's Web site.
• Register new software. Software publishers can keep you informed about patches and updates.
You can opt in or opt out of other services they offer.
• Subscribe to free Microsoft product security bulletins. Microsoft offers an e-mail alert service for
home users, as well as one for IT Professionals and others with a strong understanding of technical
issues. (http://www.microsoft.com/technet/security/bulletin/notify.mspx)
• Install software updates immediately.
Regular Maintenance

19. • Back up your files. Backing up files helps you protect your information from accidental erasure or
from a hardware failure, as well as from damage by hackers. The more virulent types of attacks
damage or infect your hard drive and you can lose valuable personal information. When you back
up your files, make sure you:
– Have a recent backup before installing new software programs or updates.
– Use at least a couple of storage disks, to cut down on the risk of one disk becoming damaged or infected.
Write the backup date on the label.
– Verify that you can read the backup disk.
– Do store your backup disks away from your computer. If content is irreplaceable, consider a fireproof box or
a safe deposit box.
• Let your antivirus software scan your files. Schedule your antivirus software to conduct weekly
scans. It can scan data files, executable files, and system files in any combination. If an infection is
found, the antivirus software will repair or quarantine specific files. Contact your antivirus vendor's
Web site for further clean-up instructions.
• Check for software and antivirus signature updates. Software programs for which you are not
receiving automatic updates or notifications, check the software publishers' Web sites.
• Defragment your Hard Disk. Use the built in Disk defragmenter or a third party utility to keep your
hard drives contents organised, and help improve the drives performance.
Regular Maintenance (Weekly)

20. • Change your passwords. Keeping the same passwords increases the likelihood that
someone else will discover your password. (See
http://www.microsoft.com/protect/yourself/password/create.mspx)
• Verify that your antivirus subscription is current. Treat it like car insurance. Don't let it
lapse.
• Reassess your situation. Your security and privacy needs might have changed due to
who is using your computer, how it's being used, or new threats on the Internet.
• Tip:
• Use the Windows Task Scheduler to schedule routine file maintenance such as
automatic disk cleanup, disk defragmenter, and virus scans. Check the Windows Help
files for instructions.
• Automate your maintenance tasks
• Computers are good at this! For example, if you are using Windows XP, Windows Me, or
Windows 2000 SP3, you can receive automatic alerts about updates needed to help
maintain security and improve operation. Contact your software vendors to see what
automated services they provide
Regular Maintenance (6 Monthly)