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Across 2. ability to self-replicate and eliminated by antiviruses. 4. a person who break into computer systems 5. software made just to enter a computer without the user’s permission or knowledge 6. stealing the contents of a Web site by copying some of its pages, 7. contain adware and monitors user activity on the Internet and transmits that information in the background to someone else 9. a person who breaks into a computer 10. normally someone who is not technologically sophisticated 11. attempting to acquire sensitive information such as usernames, passwords and credit card details by acting as a trustworthy entity in an electronic communication 14. software that automatically displays,plays or downloads ads onto a computer well being used

Down 1. do not reproduce by infecting other files, nor do they self-replicate 3. tricks in an effort to keep a visitor captive at a site, often by disabling the "Back" button or generated repeated pop-up windows. 8. a hacker's attack aiming to redirect a website's traffic to another, bogus website 12. chain letters, scams and common misunderstandings. 13. flooding the Internet with many copies of the same message