# Terminology

The following acronyms and abbreviations are used throughout this document.

| Abbreviation | Description |
|--------------|-------------|
| AES | Advanced Encryption Standard |
| BMC | Baseboard Management Controller |
| CA | Certificate Authority |
| CPU | Central Processing Unit |
| CRL | Certificate Revocation List |
| CSR | Certificate Signing Request |
| CSP | Critical Security Parameter |
| DICE | Device Identifier Composition Engine |
| DRBG | Deterministic Random Bit Generator |
| ECDSA | Elliptic Curve Digital Signature Algorithm |
| FMC | FW First Measured Code |
| GPU | Graphics Processing Unit |
| HMAC | Hash-based message authentication code |
| IDevId | Initial Device Identifier |
| iRoT | Internal RoT |
| KAT | Known Answer Test |
| KDF | Key Derivation Function |
| LDevId | Locally Significant Device Identifier |
| MCTP | Management Component Transport Protocol |
| NIC | Network Interface Card |
| NIST | National Institute of Standards and technology |
| OCP | Open Compute Project |
| OTP | One-time programmable |
| PCR | Platform Configuration Register |
| PKI | Public Key infrastructure |
| PLDM | Platform Level Data Model |
| PUF | Physically unclonable function |
| RoT | Root of Trust |
| RTI | RoT for Identity |
| RTM | RoT for Measurement |
| RTRec | RoT for Recovery |
| RTU | RoT for Update |
| SHA | Secure Hash Algorithm |
| SoC | System on Chip |
| SPDM | Security Protocol and Data Model |
| SSD | Solid State Drive |
| TCB | Trusted Computing Base |
| TCI | TCB Component Identifier |
| TCG | Trusted Computing Group |
| TEE | Trusted Execution Environment |
| TRNG | True Random Number Generator |