Cybersecurity crossword puzzle

123456
Across
  1. 4. Measures to protect computer systems from unauthorized access or attacks
  2. 5. A person who uses computers to gain unauthorized access to data
  3. 6. A part of a computer system or network that is designed to block unauthorized access while permitting outward communication
Down
  1. 1. The protection of internet-connected systems, including hardware, software, and data
  2. 2. A secret word or phrase used to gain access to a computer system
  3. 3. The state of being free from being observed or disturbed by other people