intelligence & security

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Across
  1. 1. Hidden listening device
  2. 2. Cold War spy tunnel in Berlin
  3. 4. Encrypted communication system
  4. 8. Electronic warfare tactic disrupting signals
  5. 10. Code-breaking science
  6. 11. Double agent’s role
  7. 12. Publicly accessible intelligence
  8. 16. Visual representation of signal frequencies
  9. 17. "Bridge of Spies"
  10. 18. Specialized skills, techniques, and methods employed by intelligence agents to gather information covertly
Down
  1. 1. Principal center of Allied code-breaking during WWII
  2. 3. Human intelligence (abbr.)
  3. 5. Undercover identity
  4. 6. Covert CIA-led coup in Iran
  5. 7. Map projection preserving angles
  6. 9. Malicious software
  7. 12. Predecessor to the CIA (abbr.)
  8. 13. Intercepted communications data
  9. 14. Encrypted text output
  10. 15. Satellite-collected intelligence