контррозвідка (секретна оборонна служба)
Secret Intelligence Service (SIS) / Military Intelligence, Section 6 (MI6)
secret service
secret (security classification)
secret
secret agent intelligence
secret internet protocol router network (SIPRNET)
top secret (security classification)
top secret
state secret
be drawn from secret intelligence
be marked top secret
foreign secret agent
give away the secret by careless talk
clear secret
clearance for top secret work
secret clearance
secret language
secret post
secret qualification clearance
secret security clearance
secret text
secret weapon
perimeter defense (all-around defense)
beach defense mine / beach-defense mine
Defense Security Service (DSS)
US Army Trial Defense Service
Defense Audit Service
Defense Clandestine Service (DCS)
branch (military/service branch, armed service)
separate from active service / the service
Y service (Y-service) / Y-station