| Abbreviation | Definition |
|---|---|
| IKAT | Interactive Kiosk Attack Tool |
| IMPACT | Identity Management Process Assessment Customer Tool |
| IMPS | Innovations in Mobile Privacy and Security |
| INCB | Israel National Cyber Bureau |
| INSEN | International Nuclear Security Education Network |
| IRS | Image Results and Security |
| ISDP | Institute for Security and Development Policy |
| ISDP | Institute for Security Development Policy |
| ISG | Information Security Group |
| ISIG | IBM Security Identity Governance |
| ISIG | Information Security Interest Group |
| ISISI | Internetworked Security Information Services initiative |
| ISNAP | Improved Secure Network Authentication Protocol |
| ISNP | IBM Security Network Protection |
| ISR | Intermediate Segregation Regime |
| ISS | Information Security Standard |
| ISS | Institute of security studies |
| ISS | Internal Security Service |
| ISS | International Security Standards |
| ISS | Internet Security System |