| Acronym | Meaning |
|---|
| AQUA | Appropriately Qualified Authority |
| BPS | Boundary Protection Services |
| CAA | Crypto Approval Authority |
| CCTV | Closed Circuit Television |
| CDA | Crypto Distribution Authority |
| CFSP | Common Foreign and Security Policy |
| CIS | Communication and Information Systems handling EUCI |
| Coreper | Committee of Permanent Representatives |
| CSDP | Common Security and Defence Policy |
| DSA | Designated Security Authority |
| ECSD | European Commission Security Directorate |
| EUCI | EU Classified Information |
| EUSR | EU Special Representative |
| FSC | Facility Security Clearance |
| GSC | General Secretariat of the Council |
| IA | Information Assurance |
| IAA | Information Assurance Authority |
| IDS | Intrusion Detection System |
| IT | Information Technology |
| NSA | National Security Authority |
| PSC | Personnel Security Clearance |
| PSCC | Personnel Security Clearance Certificate |
| PSI | Programme/Project Security Instructions |
| SAA | Security Accreditation Authority |
| SAB | Security Accreditation Board |
| SAL | Security Aspects Letter |
| SecOPs | Security Operating Procedures |
| SCG | Security Classification Guide |
| SSRS | System-Specific Security Requirement Statement |
| TA | TEMPEST Authority |