Security percutions

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Across
  1. 4. s a method of changing the original numbers and characters so that they are hidden or disguised. This is important if you are sending sensitive information.
  2. 6. an expert at programming and solving problems with a computer
  3. 8. It helps you prevent viruses
  4. 9. is a law that determines whether people are allowed to access computers and modify the data on the computer system.
Down
  1. 1. are used to check packets of data as they are received by a computer system from a network or the internet
  2. 2. small malicious program that can alter and delete files
  3. 3. An internet worm is a program that spreads across the internet by replicating itself on computers via their network connections.
  4. 5. This type of malicious software pretends to be a useful program while secretly performing another function
  5. 7. Any software that covertly gathers user information through the user's Internet connection without his or her knowledge, usually for advertising purposes.