0tis crossword XYZ

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Across
  1. 1. a device that performs a specific task, like the Enigma (7 letters)
  2. 4. the act of conveying information (13 letters)
  3. 5. messages sent by radio or other means (7 letters)
  4. 12. Working together towards a goal (13 letters)
  5. 16. the study of codes and ciphers (13 letters)
  6. 18. to stop or seize something before it reaches its destination (10 letters)
  7. 20. to convert a coded message back into understandable language (7 letters)
  8. 21. a state of armed conflict between different countries (3 letters)
  9. 22. the operation to intercept and decode messages (5 letters)
  10. 25. something kept hidden from others (6 letters)
  11. 26. the process of converting information into a code (11 letters)
  12. 28. the study of past events (7 letters)
  13. 29. a method of transforming a message to keep it secret (6 letters)
  14. 30. german cipher machine/code (6 letters)
  15. 33. location of the code-breaking center in the UK (7 letters)
  16. 34. Referring to covert operations (6 letters)
Down
  1. 2. gathering and analyzing information, especially for military purposes (12 letters)
  2. 3. the study of codes and ciphers (13 letters)
  3. 6. planned activities, especially in a military context (11 letters)
  4. 7. a step-by-step procedure for calculations (9 letters)
  5. 8. country where early discoveries in codebreaking occurred. (6 letters)
  6. 9. relating to armed forces (8 letters)
  7. 10. Mysterious or hard to understand (9 letters)
  8. 11. the type of machine used to help break the code (5 letters)
  9. 13. a plan of action designed to achieve a long-term goal (8 letters)
  10. 14. the act of winning a battle or war (7 letters)
  11. 15. the country that used the Enigma code for military communications (7 letters)
  12. 17. a person who secretly collects and reports information (3 letters)
  13. 19. a system of words, letters, or symbols used to represent others (4 letters)
  14. 23. information sent from one person to another (8 letters)
  15. 24. polish mathematicians who were the first to crack the Enigma cipher (5 letters)
  16. 27. mathematician who led the code-breaking efforts (6 letters)
  17. 31. the coalition of countries opposing the Axis powers (6 letters)
  18. 32. a small building; refers to the code-breaking huts at Bletchley (3 letters)