Related Clues:

• Top-secret org.
• Govt. decipherers
• Code-crackers' org.
• Intel inits.
• Electronic surveillance gp.
• U.S. codebreakers
• Fed. hush-hush gp.
• Covert org.
• Code-cracking gp.
• Govt. cryptanalysis org.
• Supersecretive government org.
• Secret govt. group
• Code crackers' org.
• Wiretapping org.
• Code-breaking D.C. gp.