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GCSE ICT. Viruses, Security & Hacking. GCSE ICT - Viruses. Introduction to Viruses – what is a virus? Computer virus definition - Malicious code of computer programming How do they work Designed to install, propagate & cause damage Work on the memory of a system

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gcse ict
GCSE ICT

Viruses, Security

&

Hacking

slide2

GCSE ICT - Viruses

  • Introduction to Viruses – what is a virus?
  • Computer virus definition

- Malicious code of computer programming

  • How do they work
    • Designed to install, propagate & cause damage
    • Work on the memory of a system
    • 2 points of invasion – Disk drives / Network adapter
    • cards
slide3

Virus

GCSE ICT - Viruses

How a virus spreads:

slide4

GCSE ICT - Viruses

  • Preventative measures
    • Anti-Virus software to scan files
  • - must be regularly updated
    • Firewall software
  • -stops malicious programs being sent through networks
  • -prevents unauthorised access (hacking)over the internet
    • Backups (regular).
  • Damage Caused
    • Home computers
    • Major organisations
    • At worst, a total loss of data!
slide5

GCSE ICT – Viruses (Recap)

  • What is a computer virus?
    • Malicious code of computer programming
  • At what 2 points can a virus enter a computer system?
    • Disk drives (i.e. floppy disk, CD)
    • Network adapter card (over the internet, via e-mail, etc)
  • Name two ways that will help prevent viruses
    • Up-to-date Anti-virus software
    • Firewalls
slide6

GCSE ICT - Security

  • Introduction to Security
  • Methods of protecting data
    • Up-to-date anti-virus software
    • Passwords/Log-ons
    • Backups
      • Stored away from the computer (tape, CD,
      • removable hard-drives, off-site Web-based server)
  • Web-based servers - Advantages
    • Back-up data less likely to be “Lost”
    • Can upload information at any time
    • Backup data can be easily be downloaded
slide7

GCSE ICT - Security

  • Web-based servers - Disadvantages
    • May not be as secure
    • Connection must be fast and reliable
    • Fire/theft may cause upload/security information to be
    • lost
  • Keep information secure
    • Prevent viruses
  • - up-to-date anti-virus software
  • - scan files at regular intervals
  • - scan all new files
slide8

GCSE ICT - Security

  • Keep information secure (continued…)
    • Prevent unauthorised access
  • - keep passwords CONFIDENTIAL!
  • - choose random passwords
  • - physical security (lock doors, etc)
  • - secure & protect sensitive information
slide9

GCSE ICT – Security (Recap)

  • What kind of information should be kept confidential?
  • Name 3 ways of protecting electronic data
    • Anti-virus software
    • Passwords/Log-ons
    • Keeping regular back-ups
  • Discuss the advantages and disadvantages of Web-based servers…
  • What ways can you prevent unauthorised access?
    • Keep passwords CONFIDENTIAL!
    • Choose random passwords
    • Physical security (lock doors, etc)
    • Secure & protect sensitive information
slide10

GCSE ICT – Hacking

  • Hacking
    • Gaining unauthorised access to a computer, electronic
    • information or network by breaking codes and
    • passwords to gain unauthorised entry to computer
    • systems.
    • Hackers can do an enormous amount of damage
    • Stand-alone computers are usually safe
    • Computers which form part of networks are in danger
    • from hackers.
slide11

GCSE ICT – Hacking

  • Hacking (continued)
    • Many hackers may or may not have no fraudulent intent
    • Often carried out by corrupt employees or employees with a grudge
    • The extent of hacking is difficult to assess, much of it is only discovered by accident.
gcse ict12
GCSE ICT

Tasks:

  • Complete ‘hackers and viruses’ handout
  • Continue your own investigations into viruses, security & hacking on the Internet
    • www.bbc.co.uk/schools/gcsebitesize/ict/
    • http://computer.howstuffworks.com/virus.htm
    • http://www.edexcel.org.uk/VirtualContent/50320/3e_Legislation.pdf
    • http://www.teach-ict.com/gcse/theory/crime/hacking/www.cnn.com/TECH/specials/hackers/primer/index.html
    • http://www.school-resources.co.uk/hackers_for_schoolresourcescouk.htm
    • http://www.teach-ict.com/gcse/theory/crime/hacking/hacking/index.htm

Make any additional notes.