| Abbreviation | Definition |
|---|---|
| NDSS | Network and Distributed System Security |
| NES | Network Encryption System |
| NFSA | National Food Security Act |
| NGA | Next Generation Access |
| NGAF | Next Generation Application Firewall |
| NHSS | National Health Security Strategy |
| NHSS | New Horizon Security Services |
| NICCS | National Initiative for Cybersecurity Careers and Studies |
| NICP | NATO Industry Cyber Partnership |
| NISO | National Information Standards Organization |
| NNCC | National Network Cyber Centre |
| NNE | Native Network Encryption |
| NORA | Non-Obvious Relationship Awareness |
| NOSSA | Naval Ordnance Safety and Security Activity |
| NPE | No Payload Encryption |
| NPPY | Not Pixel Perfect Yet |
| NPSN | Non-Public Secure Network |
| NSA | National Security Adviser |
| NSAD | Network Security Architecture And Design |
| NSAP | Network Security and Privacy |