The Cybersecurity Crossword

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Across
  1. 5. Science of encryption and decryption
  2. 6. A network security device that works based on predetermined security rules
Down
  1. 1. Converting data into code to prevent unauthorized access
  2. 2. Software designed to exploit computers
  3. 3. Tricking individuals for private information using deceptive websites/e-mails
  4. 4. Software that encrypts data and demands ransom in exchange for decryption key