Public Review

Before publishing a specification, TCG first releases it for a period of public review. During this period, anyone can read the draft and send comments to TCG.

How to submit comments

Please submit any comments or feedback on the specifications currently in review to TCG Administration. All feedback must be received by the end of the review period, at 5:00pm Pacific.

Currently in public review

TPM Communication Over SPDM Secure Session v2.0

• Server Work Group
• Review period: October 21, 2026 – December 20, 2026, 5:00pm Pacific
• Draft: Download PDF

TCG TPM Vendor ID Registry v1.09 RC1

• Work Group: Technical Committee
• Review period: September 18, 2026 – November 17, 2026, 5:00pm Pacific
• Draft: Download PDF

Previously in public review

2026

• Storage MEK Multiparty Authorization Feature V1.10 RC1 (Storage Work Group, July 28, 2026 – September 26, 2026)
• DICE Certificate Profile V1.2 RC1 (DICE Work Group, July 23, 2026 – September 21, 2026)
• DICE Attestation Architecture V1.3 RC1 (DICE Work Group, July 23, 2026 – September 21, 2026)
• TCG Registry of Reserved TPM 2.0 Handles and Localities Version V1.09 RC1 (Technical Committee Work Group, July 9, 2026 – September 7, 2026)
• TPM Active Interposer Mitigation Guidance V1 R1 (Data Center Work Group, June 4, 2026 – August 3, 2026)
• TCG Attestation Framework Part 2 V1 RC1 (Attestation Work Group, June 12, 2026 – July 12, 2026)
• TCG Storage Epoch Key Purge Feature V1 RC1 (Storage Work Group Specification, April 15, 2026 – June 15, 2026)
• TCG PC Client Device Driver Design Principles TPM 2.0 V1 RC1 (PC Client Work Group Specification, May 13, 2026 – June 12, 2026)
• TCG Component RIM Binding for CoRIM V1 RC1 (PC Client Work Group Specification, April 1, 2026 – May 31, 2026)
• TCG TPM Vendor ID Registry Family 1.2 and 2.0 v1.08 RC1 (Technical Committee Specification, March 27, 2026 – May 26, 2026)
• TCG PC Client Specific Platform TPM Profile for TPM 2.0 Version 1.07 RC 1 (PC Client Work Group Specification, December 12, 2025 – February 10, 2026)
• Trusted Platform Module 2.0 Library Version 185 RC4: Part 0 – Introduction, Part 1 – Architecture, Part 2 – Structures, Part 3 – Commands (TPM Work Group Specification, December 12, 2025 – February 10, 2026)
• TCG_Storage_Opal Family Logical Port Locking Feature V1 RC1 (Storage Work Group Specification, November 12, 2025 – January 11, 2026)
• TCG EK Credential Profile for TPM Family 2.0 Level 0 Version 2.7 RC1 (Infrastucture Work Group Specification, November 7, 2025 – January 6, 2026)

2025

• TCG Storage Opal Family Test Cases V1.02 RC1 (Storage Work Group Specification, October 8, 2025 – December 7, 2025)
• Protection Profile PC Client Specific TPM: TPM Library Specification Family “2.0” Version 2.0 RC1 (Security Evaluation Work Group Specification, September 18, 2025 – November 17, 2025)
• TCG TPM Communication over SPDM Secure Session V1.0 RC1 (Server Work Group Specification, September 5, 2025 – November 4, 2025)
• TCG Platform Requirements for Certificates and RIMs V1.0 RC1 (PC Client Work Group Specification, August 25, 2025 – October 24, 2025)
• TCG DICE Protection Environment Command Response Buffer Version 1.0 RC1 (DICE Work Group Specification, July 29, 2025 – September 27, 2025)
• TCG DICE Protection Environment Command Response Buffer Version 1.0 RC1 (DICE Work Group Specification, July 29, 2025 – September 27, 2025)
• Registry Of Reserved TPM 2.0 Handles and Localities V1.6 RC1 (Technical Committee Specification, July 23, 2025 – September 21, 2025)
• TCG ACPI General Specification V1.50 RC1 (Server Work Group Specification, July 18, 2025 – September 16, 2025)
• TCG Storage MEK Multiparty Authorization Feature V1 RC1 (Storage Work Group Specification, July 10, 2025 – September 8, 2025)
• TCG Storage Configurable Locking for NVMe Namespaces and SCSI LUNs V1.30 RC1 (Storage Work Group Specification, July 10, 2025 – September 8, 2025)
• TCG Platform Certificate Profile 2.1 RC1 (Infrastructure Work Group Specification, July 8, 2025 – September 6, 2025)
• Trusted Platform Module 2.0 Library Version 185 RC2: Part 0 – Introduction, Part 1 – Architecture, Part 2 – Structures, Part 3 – Commands (TPM Work Group Specification, July 10, 2025 – September 8, 2025)
• EK-Based Key Attestation with TPM Firmware Version V1 RC1 (TPM Work Group Specification, July 9, 2025 – August 8, 2025)
• TCG Attestation Framework Part 1 Version 1.0 RC 1 (Attestation Work Group Specification, May 20, 2025 – July 19, 2025)
• TCG Storage Interface Interactions Specification (SIIS) Version 1.20 RC 1 (Storage Work Group Specification, May 2, 2025 – July 1, 2025)
• TCG Algorithm Registry Version 2.0 RC2 (Technical Committee Specification, April 21, 2025 – June 20, 2025)
• IoT Platform Profile of TCG Cyber Resilient Modules and Building Blocks Version 1.0 RC 1 (IoT Work Group Specification, April 16, 2025 – June 15, 2025)
• TCG Component RIM Binding for SWID/CoSWID Version 1.0 RC 2 (PC Client Work Group Specification, April 16, 2025 – June 15, 2025)
• TCG DICE Concise Evidence Binding for SPDM Version 1.1 RC 1 (DICE Work Group Specification, April 10, 2025 – June 9, 2025)
• TCG Algorithm Registry Version 2.0 RC1 (Technical Committee Specification, March 24, 2025 – May 23, 2025)
• TCG TPM Communication over SPDM Secure Session Version 1.0 RC 1 (Server Work Group Specification, February 13, 2025 – April 14, 2025)
• DICE Attestation Architecture Version 1.2 RC 1 (DICE Work Group Specification, January 9, 2025 – March 9, 2025)
• TCG PC Client Platform TPM Profile Specification for TPM 2.0 Version 1.06 RC 1 (PC Client Work Group Specification, January 9, 2025 – March 9, 2025)
• TPM 2.0 Keys for Device Identity and Attestation Version 1.1 RC 1 (Infrastructure Work Group Specification, January 9, 2025 – March 9, 2025)
• Trusted Platform Module 2.0 Library Version 184: Part 0: Introduction, Part 1: Architecture, Part 2: Structures, Part 3: Commands (Trusted Platform Module Specification, December 20, 2024 – February 18, 2025)
• TCG Component Reference Integrity Manifest Information Model Version 1.0 Revision 41 (Infrastructure Work Group Specification, December 11, 2024 – February 9, 2025)
• Canonical Event Log Format Version 1.1 Revision 10 (Infrastructure Work Group Specification, December 11, 2024 – February 9, 2025)

2024

• TCG Component RIM Binding for SWID/CoSWID Version 1.0 Revision 22 (PC Client Work Group Specification, October 9, 2024 – December 8, 2024)
• TCG Algorithm Registry Family "2.0" Level 00 Revision 01.35 (Technical Committee Specification, September 23, 2024 – November 22, 2024)
• TCG Storage Security Subsystem Class (SSC): Opal Version 2.30 Revision 0.21 (Storage Work Group Specification, July 30, 2024 – September 28, 2024)
• TCG TPM Vendor ID Registry Family 1.2 and 2.0 Version 1.07 Revision 0.02 (Technical Committee Specification, July 16, 2024 – September 14, 2024)
• TCG EK Credential Profile for TPM Family 2.0 Level 0 Version 2.6 Revision 25 (Infrastructure Work Group Specification, July 16, 2024 – September 14, 2024)
• TCG OID Registry Version 1.00 Revision 0.74 (Infrastructure Work Group Reference Document, July 11, 2024 – September 9, 2024)
• TCG TPM Vendor ID Registry Family 1.2 and 2.0 Revision 0.95 (Technical Committee Specification, May 8, 2024 – July 7, 2024)
• TCG PC Client Platform TPM Profile Specification for TPM 2.0 Version 1.06 Revision 32 (PC Client Work Group Specification, April 5, 2024 – June 4, 2024)
• TCG PC Client Platform Reset Attack Mitigation Specification Version 1.2 Revision 10 (PC Client Work Group Specification, April 1, 2024 – May 31, 2024)
• TCG DICE Protection Environment Version 1.0 Revision 0.13 (DICE Work Group Specification, March 21, 2024 – May 20, 2024)
• TCG Component Reference Integrity Manifest Information Model Version 1.0 Revision 38 (Infrastructure Work Group Specification, February 28, 2024 – April 28, 2024)
• TCG Platform Certificate Profile Version 2.0 Revision 38 (Infrastructure Work Group Specification, February 2, 2024 – April 2, 2024)
• Hardware Requirements for a Device Identifier Composition Engine Version 1.0 Revision 0.91 (DICE Work Group Specification, January 18, 2024 – March 18, 2024)
• TCG FIPS 140-3 Guidance for TPM 2.0 Version 1.0 Revision 1 (Security Evaluation Work Group Guidance, February 14, 2024 – March 15, 2024)
• Overview of TCG Technologies for Device Identification and Attestation Version 1.0 Revision 1.37 (Infrastructure Work Group Guidance, February 5, 2024 – March 6, 2024)
• Trusted Platform Module Library Family 2.0 Level 00 Revision 1.81: Part 1: Architecture, Part 2: Structures, Part 3: Commands, Part 4: Supporting Routines (Trusted Platform Module Specification, December 11, 2023 – February 9, 2024)
• TCG ACPI Specification Version 1.4 Revision 14 (Server Work Group Specification, November 28, 2023 – January 27, 2024)

2023

• Measurement and Attestation RootS (MARS) Serialization Interface Version 0 Revision 23 (MARS Work Group Specification, October 20, 2023 – December 19, 2023)
• TCG PC Client Reference Integrity Manifest Version 1.1 Revision 10 (Infrastructure Work Group Specification, October 18, 2023 – December 17, 2023)
• TCG Reference Integrity Manifest (RIM) Information Model Version 1.1 Revision 0.9 (Infrastructure Work Group Specification, October 18, 2023 – December 17, 2023)
• Storage Component Class Registry Version 1.0 Revision 21 (Infrastructure Work Group Specification, September 21, 2023 – November 20, 2023)
• Registry of Reserved TPM 2.0 Handles and Localities Version 1.2 Revision 0.91 (Technical Committee Reference Document, September 8, 2023 – October 8, 2023)
• TCG Storage Opal Family Feature Set: Additional Datastore Tables Version 1.01 Revision 1.17 (Storage Work Group Specification, August 8, 2023 – October 7, 2023)
• TCG DICE Concise Evidence Binding for SPDM Version 1.0 Revision 53 (DICE Work Group Specification, August 1, 2023 – September 30, 2023)
• DICE Attestation Architecture Version 1.1 Revision 17 (DICE Work Group Specification, August 1, 2023 – September 30, 2023)
• TCG PC Client Platform Firmware Profile Version 1.06 Revision 49 (PC Client Work Group Specification, July 31, 2023 – September 29, 2023)
• TCG Storage Application Note: Encrypting Drives Compliant with Key Per I/O SSC v1.0 D1.07 (Storage Work Group Reference Document, July 17, 2023 – August 16, 2023)
• TCG Algorithm Registry Revision 1.34 (Technical Committee Specification, June 1, 2023 – July 31, 2023)
• TCG Storage Security Subsystem Class (SSC): Key Per I/O Version 1.00 Revision 1.40 (Storage Work Group Specification Document, May 22, 2023 – July 21, 2023)
• TCG TPM Vendor ID Registry Version 1.06 Revision 0.94 (Technical Committee Specification, May 9, 2023 – July 8, 2023)
• TCG Mobile Reference Architecture Version 2 Revision 45 (Mobile Platform Work Group Specification Document, April 25, 2023 – June 24, 2023)
• TCG CPU to TPM Bus Protection Guidance –Passive Attack Mitigations Version 1.0 Revision 12 (PC Client Work Group Specification Document, May 8, 2023 – June 7, 2023)
• TCG DICE Protection Environment Specification Version 1.0 Revision 0.6 (DICE Work Group Specification Document, February 14, 2023 – April 16, 2023)
• TCG Storage Opal Family Test Cases Specification Version 1.01 Revision 1.09 (Storage Work Group Specification Document, February 10, 2023 – April 11, 2023)
• TCG Storage Opal Family Feature Set: C_PIN Enhancements Version 1 Revision 1.20 (Storage Work Group Specification Document, January 26, 2023 – March 27, 2023)
• MARS API Specification Version 1.0 (MARS Work Group Specification Document, February 10, 2023 – March 13, 2023)
• TCG SWG SIIS Version 1.11 Revision 1.16 (Storage Work Group Specification Document, December 14, 2022 – February 13, 2023)

2022

• TCG Component Class Registry V1.0 R11 (Infrastructure Work Group Specification Document, October 11, 2022 – December 11, 2022)
• Storage Component Class Registry V1.0 R16 (Infrastructure Work Group Specification Document, October 11, 2022 – December 11, 2022)
• PC Client Platform Physical Presence Interface Specification V1.4 R15 (Server Work Group Specification Document, July 22, 2022 – September 20, 2022)
• Measurement and Attestation RootS (MARS) Library Specification V1 R12 (MARS Work Group Specification Document, July 22, 2022 – September 20, 2022)
• TCG DICE Endorsement Architecture for Devices V1 R38 (Infrastructure Work Group Specification Document, May 6, 2022 – July 5, 2022)
• TCG Infrastructure EK Credential Profile For TPM Family 2.0; Level 0 V2.5 R1.0 (DICE Work Group Specification Document, March 28, 2022 – May 27, 2022)
• Cyber Resilient Module and Building Block Requirements Version 1.0 Revision 0.100 (Cyber Resilient Technologies Work Group Specification Document, March 25, 2022 – May 24, 2022)
• TCG Guidance on Integrity Measurements and Event Log Processing Version 1.0 Revision 0.118 (Infrastructure Work Group Reference Document, January 25, 2022 – February 24, 2022)
• Measurement and Attestation RootS (MARS) Library Specification Version 1 Revision 4 (Measurement and Attestation RootS (MARS) Work Group Specification, January 5, 2022 – March 6, 2022)

2021

• Canonical Event Log Format Version 1.0 Revision 0.37 (Infrastructure Work Group Specification, October 11, 2021 – December 11, 2021)
• TCG Storage Opal SSC Feature Set: Configurable Locking for NVMe Namespaces and SCSI LUNs Version 1.02 Revision 1.14 (Storage Work Group Specification, October 11, 2021 – December 11, 2021)
• TCG Storage Application Note: Configurable Namespace Locking Examples Version 1.0 Revision 2.0 (Storage Work Group Reference Document, September 16, 2021 – October 17, 2021)
• TCG TPM Vendor ID Registry Version 1.06 Revision 0.91 (Technical Committee Specification, May 11, 2021 – July 11, 2021)
• Trusted Platform Module Library Family 2.0 Level 00 Revision 1.64 – Part 1: Architecture; Trusted Platform Module Library Family 2.0 Level 00 Revision 1.64 – Part 2: Structures; Trusted Platform Module Library Family 2.0 Level 00 Revision 1.64 – Part 3: Commands; Trusted Platform Module Library Family 2.0 Level 00 Revision 1.64 – Part 3: Commands with Code; Trusted Platform Module Library Family 2.0 Level 00 Revision 1.64 – Part 4: Supporting Routines; Trusted Platform Module Library Family 2.0 Level 00 Revision 1.64 – Part 4: Supporting Routines with Code; Trusted Platform Module Library Family 2.0 Level 00 Revision 1.64 – Parts 1-4 (Trusted Platform Module Work Group Specification, March 15, 2021 – May 15, 2021)
• Cyber Resilient Module and Building Block Requirements Version 1.0 Revision 0.08 (Cyber Resilient Technologies Work Group Specification, November 13, 2020 – January 13, 2021)

2020

• TCG Trusted Platform Module Library Family 2.0 Level 00 Revision 1.62 – Part 1: Architecture; TCG Trusted Platform Module Library Family 2.0 Level 00 Revision 1.62 – Part 2: Structures; TCG Trusted Platform Module Library Family 2.0 Level 00 Revision 1.62 – Part 3: Commands with Code; TCG Trusted Platform Module Library Family 2.0 Level 00 Revision 1.62 – Part 4: Supporting Routines with Code; TCG Trusted Platform Module Library Family 2.0 Level 00 Revision 1.62 – Parts 1-4; TCG Trusted Platform Module Library Family 2.0 Level 00 Revision 1.62 – Code File; DISCLAIMERS, NOTICES, AND LICENSE TERMS for the code zip file: (Trusted Platform Module Work Group Specification, May 7, 2020 – July 7, 2020)

THIS CODE ZIP FILE AND EACH FILE CONTAINED HEREIN ARE PROVIDED “AS IS” WITH NO WARRANTIES WHATSOEVER, INCLUDING ANY WARRANTY OF MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR ANY PARTICULAR PURPOSE, OR ANY WARRANTY OTHERWISE ARISING OUT OF ANY PROPOSAL, DOCUMENT OR SAMPLE. Without limitation, TCG disclaims all liability, including liability for infringement of any proprietary rights, relating to use of information in this document and to the implementation of this document, and TCG disclaims all liability for cost of procurement of substitute goods or services, lost profits, loss of use, loss of data or any incidental, consequential, direct, indirect, or special damages, whether under contract, tort, warranty or otherwise, arising in any way out of use or reliance upon this document or any information herein.

Except where otherwise indicated on an individual file herein, the contents of this zip file are Copyright © 2020 Trusted Computing Group.

The contents of individual files contained herein are informative.

• TCG Reference Integrity Manifest (RIM) Information Model Version 1.00 Revision 0.13 (Infrastructure Work Group Specification, December 4, 2019 – February 3, 2020)

2019

• TPM 2.0 Authenticated Countdown Timer (ACT) Command Version 1.0 Revision 3 (Trusted Platform Module Work Group Specification, October 4, 2019 – December 4, 2019)
• TCG Trusted Platform Module Library Family 2.0 Level 00 Revision 1.55 – Part 1: Architecture; TCG Trusted Platform Module Library Family 2.0 Level 00 Revision 1.55 – Part 2: Structures; TCG Trusted Platform Module Library Family 2.0 Level 00 Revision 1.55 – Part 3: Commands with Code; TCG Trusted Platform Module Library Family 2.0 Level 00 Revision 1.55 – Part 4: Supporting Routines with Code; TCG Trusted Platform Module Library Family 2.0 Level 00 Revision 1.55 – Parts 1-4 (Trusted Platform Module Work Group Specification, May 17, 2019 – July 17, 2019)
• TCG Trusted Platform Module Library Family 2.0 Level 00 Revision 1.50 – Part 1: Architecture; TCG Trusted Platform Module Library Family 2.0 Level 00 Revision 1.50 – Part 2: Structures; TCG Trusted Platform Module Library Family 2.0 Level 00 Revision 1.50 – Part 3: Commands; TCG Trusted Platform Module Library Family 2.0 Level 00 Revision 1.50 – Part 4: Supporting Routines (Trusted Platform Module Work Group Specification, January 2, 2019 – March 4, 2019)

2018

• TCG Trusted Platform Module Library Family 2.0 Level 00 Revision 1.46 – Part 1: Architecture; TCG Trusted Platform Module Library Family 2.0 Level 00 Revision 1.46 – Part 2: Structures; TCG Trusted Platform Module Library Family 2.0 Level 00 Revision 1.46 – Part 3: Commands; TCG Trusted Platform Module Library Family 2.0 Level 00 Revision 1.46 – Part 4: Supporting Routines (Trusted Platform Module Work Group Specification, November 16, 2017 – January 16, 2018)