| No. | Item | Definition |
|---|---|---|
| 1. | access | ability to approach or enter |
| 2. | agent | person acting secretly |
| 3. | alias | assumed false name |
| 4. | analysis | careful examination of information |
| 5. | anomaly | something unusual or irregular |
| 6. | assessment | judgment based on available information |
| 7. | asset | useful source or resource |
| 8. | assumption | belief accepted without proof |
| 9. | baseline | normal reference point |
| 10. | bias | systematic tendency or prejudice |
| 11. | briefing | short presentation of key information |
| 12. | brush pass | quick secret handoff |
| 13. | collection | gathering of information |
| 14. | compromise | exposure of secret information |
| 15. | confidence | degree of certainty |
| 16. | contact | person with useful access |
| 17. | corroboration | confirming support from other evidence |
| 18. | cover | false identity or appearance |
| 19. | covert | hidden from public view |
| 20. | credibility | believability of a source |
| 21. | dead drop | secret exchange location |
| 22. | debrief | question after an operation |
| 23. | deception | deliberate misleading of others |
| 24. | decision-maker | person who chooses actions |
| 25. | defector | person who abandons allegiance |
| 26. | disinformation | false information spread deliberately |
| 27. | dissemination | distribution of information products |
| 28. | double agent | agent serving two sides |
| 29. | elicitation | drawing out information subtly |
| 30. | espionage | secret gathering of information |
| 31. | estimate | approximate judgment or calculation |
| 32. | evidence | facts supporting a conclusion |
| 33. | exfiltration | secret removal from a place |
| 34. | facilitator | person enabling an operation |
| 35. | footprint | trace left by activity |
| 36. | forecast | prediction based on evidence |
| 37. | forensics | scientific examination of evidence |
| 38. | fusion | integration of multiple sources |
| 39. | geolocation | identifying a precise location |
| 40. | granularity | level of detail |
| 41. | handler | person managing a source |
| 42. | hypothesis | proposed explanation to test |
| 43. | imagery | visual intelligence from images |
| 44. | indicator | sign suggesting a condition |
| 45. | inference | conclusion drawn from evidence |
| 46. | infiltration | secret entry into a group |
| 47. | informant | person providing information |
| 48. | intelligence | collected information for decision-making |
| 49. | intent | purpose or planned aim |
| 50. | intercept | captured communication or signal |
| 51. | interrogation | formal intensive questioning |
| 52. | leak | unauthorized disclosure of information |
| 53. | legend | fabricated background story |
| 54. | linkage | connection between people or events |
| 55. | logistics | movement and support planning |
| 56. | metadata | data describing other data |
| 57. | misinformation | false information spread mistakenly |
| 58. | mitigation | action reducing harm |
| 59. | mobilization | preparation for organized action |
| 60. | mole | long-term hidden insider |
| 61. | network | connected group of people |
| 62. | nexus | central connection or link |
| 63. | overt | open and observable |
| 64. | pattern | repeated or recognizable arrangement |
| 65. | penetration | entry into a protected target |
| 66. | posture | overall readiness or stance |
| 67. | precision | exactness of information |
| 68. | priority | level of importance |
| 69. | probability | likelihood of something happening |
| 70. | propaganda | biased persuasive information |
| 71. | provenance | origin and history of something |
| 72. | reconnaissance | information gathering by observation |
| 73. | recruitment | process of gaining a source |
| 74. | relevance | direct importance to the issue |
| 75. | reliability | consistency and dependability |
| 76. | report | formal account of findings |
| 77. | requirement | needed information or condition |
| 78. | risk | chance of loss or danger |
| 79. | safe house | secure covert meeting place |
| 80. | scenario | possible sequence of events |
| 81. | signature | distinctive identifying pattern |
| 82. | source | origin of information |
| 83. | specificity | exactness and precision |
| 84. | supply chain | linked flow of goods |
| 85. | surveillance | close observation over time |
| 86. | synthesis | combining parts into a whole |
| 87. | target | person or thing of interest |
| 88. | threat | possible source of harm |
| 89. | threshold | point at which change matters |
| 90. | timeliness | arriving when still useful |
| 91. | tradecraft | practical skills of espionage |
| 92. | trend | general direction of change |
| 93. | triangulation | cross-checking through three sources |
| 94. | trigger | event causing a response |
| 95. | uncertainty | state of not knowing |
| 96. | verification | checking truth or accuracy |
| 97. | vetting | careful background checking |
| 98. | vulnerability | weakness open to attack |
| 99. | walk-in | voluntary unsolicited source |
| 100. | warning | notice of possible danger |