| Abbreviation | Definition |
|---|---|
| TNI | Trusted Network Interpretation |
| TOR | Trusted Operating Root |
| TOS | Trusted Operating System |
| TP | Tamper Proof |
| TPA | Third Party Access |
| TPA | Third Party Auditor |
| TPE | Trusted Path Execution |
| TPF | Tiny Personal Firewall |
| TPKE | Threshold Public Key Encryption |
| TPL | Trusted Products List |
| TPM | Technical Protection Measure |
| TPM | Trusted Platform Module |
| TPV | Third Party Verification |
| TRU | Trusted Reliable User |
| TSI | Telecommunication Security Information |
| TSM | Trusted Service Management |
| TSOL | Trusted SOLaris operating system |
| TSP | Tracking Security Protection |
| TSS | Transaction Security System |
| TSSA | Trusted System Software Architecture |