| |||
cryptographic system | |||
concealment system; secrecy system (связи) | |||
secrecy system | |||
cipher system |
система засекречивания : 14 phrases in 7 subjects |
Communications | 1 |
Household appliances | 1 |
Information security and data protection | 4 |
Mass media | 1 |
Military | 1 |
Security systems | 4 |
Technology | 2 |