crossword on computer language and browsing safely

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Across
  1. 1. a software that helps in preventing unauthorised access to your computer by blocking unsolicited communication
  2. 5. the number system only understood by computers
  3. 7. full form of virus
  4. 8. consist of number 0-9 with the base 10
  5. 9. also known as unethical hackers
  6. 11. a computer program which is designed to identify, prevent and remove a virus from a computer
  7. 12. refers to a illegal entry into a computer system or network
  8. 13. terrorism the process to conduct terrorism through computer and internet in order to cause fear and panic
  9. 15. a act of harming or harassing someone through information technology in a deliberate manner
Down
  1. 2. the right most digit of a number
  2. 3. a german mathematician who is credited with the invention of the modern binary number system
  3. 4. a set of values used to represent different quantities
  4. 6. a famous antivirus
  5. 10. the process of 'befriending' children on social media to facilitate online and physical sexual abuse
  6. 14. a India's greatest mathematician and astronomer who introduced the concept of zero without which the modern computer technology would have been non-existent