The document is an introduction to computer system security presented by Alicia Pedrosa Sánchez. It discusses examples of hacker attacks on websites. It emphasizes that computer security is only as strong as its weakest link, often the user. Social engineering techniques are described that try to manipulate users into giving up confidential information. The document also defines threats, vulnerabilities, and attacks and gives recommendations for choosing strong, unique passwords.

1. Introduction to computer
system security
Alicia Pedrosa Sánchez 1
OXFORD - JULY 2014
ERASMUS+ KA1

2. Introduction
• Same examples…
• May 21, 2012
A hacker group hacked the website of IBM Research
• May 22, 2012
• A hacker group called Anonymous attacked the website of
the U.S. Department of Justice, filtering about 1.7GB of
information, including internal staff email
Alicia Pedrosa Sánchez 2

3. Introduction
• Let’s see more examples
Alicia Pedrosa Sánchez IES José Rodrigo Botet 3

4. Introduction
• After watching this video:
• It’s important to secure a computer system?
• And your personal computer at home?
Alicia Pedrosa Sánchez IES José Rodrigo Botet 4

5. Introduction
YES, OF COURSE IT IS!!!!!
• We have to reach a compromise between
the value of what I have to assure and how
much I can spend on secure them
• Do we really need it?
Alicia Pedrosa Sánchez 5

6. Exercise 1:
How much I know about security?
• Let’s check how much
we know about
computer system
security by doing a
crossword in pairs
Alicia Pedrosa Sánchez IES José Rodrigo Botet 6

7. Computer security as a global
approach
The security level of a system is effective only
if the security level of the weakest link is
Computer security system is as strong as the
weak link
Alicia Pedrosa Sánchez 7

8. Computer security as a global
approach
•Unfortunatelly, users
are the weakest link
Alicia Pedrosa Sánchez 8

9. Computer security as a global
approach
Alicia Pedrosa Sánchez 9

10. Social engineering
• What we have seen in the video are
different practices of social engineering
• Social engineering is based on the weakest
link is the user
• 1. We want to help
2. We always trust the others
3. We don’t like to say “no”
4. We like to be praised
Alicia Pedrosa Sánchez 10

11. Social Engineering
Social engineering is the art of manipulating
people so they give up confidential
information
For instance: by changing their password by a
pen
Alicia Pedrosa Sánchez 11

12. Exercise 2:
Will I be fired from work?
• Find the heading of these social
engineering technics
• Work in pairs
Alicia Pedrosa Sánchez IES José Rodrigo Botet 12

13. Some definitions
• Threat is a possible danger that might exploit
a vulnerability to breach security and thus
cause possible damage
• Vulnerability is a weakness which allows an
attacker to reduce a system's security
• Attack is any attempt to destroy, expose, alter,
disable, steal or gain unauthorized access to or
make unauthorized use of computer system
Alicia Pedrosa Sánchez IES José Rodrigo Botet 13

14. Threats
• Logical threats
• Physical threats
• Human Threats
Alicia Pedrosa Sánchez IES José Rodrigo Botet 14

15. One last recommendation
• Your password is like your toothbrush
• Choose a good one
• Use it every day
• Change it from time to time
• DON’T SHARE IT with anyone
Alicia Pedrosa Sánchez IES José Rodrigo Botet 15

16. Alicia Pedrosa Sánchez IES José Rodrigo Botet 16
END
CLIL MATERIAL FOR TEACHING
COMPUTER SCIENCES