computer security

computer security

1. INTERNET

   • Network tat connects computers and people around the world
     • ACTIVE SECURITY
       • The set of actions aimed at protecting the computer and the content
     • PASSIVE SECURITY
       • Minimise the impact of possible computer damage
     • To use a computer on a network:
       • Know how to use it
         • Know what security tools are available to us
           • Apply a set of basic security rules

2. SECURITY IN THE COMPUTER

   • MALWARE
     • Software developed to ,malicious purposes
       • VIRUS
         • Program that installs itself in a computer without the user´s consent
       • KEYLOGGER
         • Obtain and memorise keystrokes
       • WORM
         • Flood the system memory
       • SPYWARE
         • Not all are malware
           • Trojan: Destroy information saved on disks
           • Hijackers: programs that hijack programs to use their rights.
           • Adware: Advertising included in programs that appears after installation
   • OTHER THERMINOLOGY OBOUT SECURITY
     • HACKERS
       • Expert computer criminal
         • They do not necessarily cause harm
     • CRACKERS
       • Try and change how a commercial program works
         • Is used without a licence
     • PHARMING
       • Redirecting a domain name to a different computer
     • COOKIES
       • Files that are saved to the computer by the browser
         • When we enter a website
     • HOAXES
       • Are chain e-mails to gather e-mail adress and carry oout mailings
     • SPAM OR JUNK EMAIL
       • E-mail messages that flood the network to advertise products
         • Are sent in masse
   • SOFTWARE AND PREVENTION ELEMENTS
     • ANTIVIRUS
     • FIREWALL
     • PROXY
     • PASSWORDS
     • CRYPTOGRAPHY