Possible Clues:

• Super-secret government org
• Intel-gathering govt. group
• Govt. cryptanalysis org
• Govt. employer of mathematicians
• Cloak-and-dagger org
• DOD division
• Govt. group for mathematicians
• Org. Edward Snowden worked for
• Org. in the documentary 'Citizenfour'
• Org. that abhors leaks