| Abbreviation | Definition |
|---|---|
| ECDHE | Elliptic Curve Diffie Hellman Ephemeral |
| ECPS | Embedded and Cyber Physical Systems |
| ECPV | Efficient Certificate Path Validation scheme |
| ECS | Encryption Control System |
| ECSA | European Corporate Security Association |
| ECSC | European Cyber Security Challenge |
| ECSG | European Cyber Security Group |
| ECSM | European Cyber Security Month |
| ECSO | European Cyber Security Organisation |
| EDE | encryption decryption encryption |
| EDPC | Encryption Domain Per Community |
| EEE | End-to-End Encryption |
| EEMSG | Enterprise E Mail Security Gateway |
| EEMSG | Enterprise Email Message Security Gateway |
| EEMSG | Enterprise E-mail Security Gateway |
| EERM | Endpoint Encryption for Removable Media |
| EERM | Endpoint Encryption Removable Media |
| EESP | Entrust Entelligence Security Provider |
| EFF | Electronic Frontier Foundation |
| EHE | Exchange Hosted Encryption |