| Abbreviation | Definition |
|---|---|
| FHE | Fully Homomorphic Encryption |
| FIDO | Fast IDentity Online |
| FIRST | Forum for Incident Response and Security Teams |
| FK | Fake Key |
| FMAC | Functional Mission Analysis Cyber |
| FNSA | Fortinet Network Security Academy |
| FOIA | Freedom Of Information Act |
| FOUT | Frequency Out |
| FPE | Format Preserving Encryption |
| FPOC | Fortezza PKI (Public Key Infrastructure) Operations Center |
| FRIES | Face Recognition for Identity Enabled System |
| FSA | Financial Security Assured |
| FSAU | Food Security Assessment Unit |
| FTE | Format Transforming Encryption |
| GABCS | Government Advisory Board for Cyber Security |
| GCA | Global Cyber Alliance |
| GCTI | GIAC Cyber Threat Intelligence |
| GFCE | Global Forum On Cyber Expertise |
| GIN | Global Intelligence Network |
| GNS | Global Network Security |