computer security

computer security

1. active security

   • aims at protecting the computer and its content

2. passive security

   • aims to minimise the impact of possible computer damage

3. malicious software

   • software developed for maliious software
     • virus
       • progam
         • installs itself
           • aim of causing harm
     • keylogger
       • software
         • attemps to obtain keystrokes
           • aim of obtainig passwords
     • worm
       • purpose
         • to flood the system memory
           • by reproducing itself
     • spyware

4. software to protect the computer

   • antivirus
   • firewall
   • proxy
   • passwords
   • cryptography

5. software licences

   • commercial software
   • freeware
   • free software
   • copyleft
   • GNU

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