TPM Library Specification

Date Published: October, 01, 2014

TCG has released the TPM 2.0 library specification that provides updates to the previous published TPM main specifications.

The changes and enhancements compared to the existing TPM 1.2 include:

  • Support for additional cryptographic algorithms
  • Enhancements to the availability of the TPM to applications
  • Enhanced authorization mechanisms
  • Simplified TPM management
  • Additional capabilities to enhance the security of platform services

Other, future TCG specifications will detail how the TPM can be implemented in various platforms through TCG platform specific specifications. These future specifications include the TPM Software Stack specification (TSS) and separate specifications for PCs, mobile, embedded and virtualized platforms.

More information, the specification and other documents can be found at

JTC 1, a joint committee of the International Organization for Standardization, or ISO, and IEC, the International Electrotechnical Commission, has approved the final ballot for publication of the Trusted Computing Group Trusted Platform Module Library Specification 2.0 as the International Standard ISO/IEC 11889:2015, Parts 1-4, in 2015.

The ISO/IEC 11889:2015 standard publication is currently available at:

ISO/IEC 11889-1:2015 Information technology — TPM Library — Part 1: Architecture
ISO/IEC 11889-2:2015 Information technology — TPM Library — Part 2: Structures
ISO/IEC 11889-3:2015 Information technology — TPM Library — Part 3: Commands
ISO/IEC 11889-4:2015 Information technology — TPM Library — Part 4: Supporting Routines

The availabilty of a complimentary download from ISO is under investigation.

Latest Version:

Trusted Platform Module Library Specification, Family “2.0”, Level 00, Revision 01.16 – October 2014

Related Errata:

Previous Version:

Previous Versions:

Trusted Platform Module Library Specification, Family “2.0”, Level 00, Revision 00.99- October 2013

Trusted Platform Module Library Specification, Family “2.0”, Level 00, Revision 00.96 – March 2013

Previous Public Review Version:

The following TCG Trusted Platform Module (TPM) Work Group specification was posted for public review by Tuesday, May 13, 2014.

Trusted Platform Module Library Specification, Family “2.0”, Level 00, Revision 01.07- March 2014


Q. What will this specification be used for?

  1. The TPM 2.0 specification is a “library specification”, which means that it supports a wide variety of functions, algorithms and capabilities upon which future platform-specific specifications will be based. Basically, it is the core capabilities and commands of the TPM. The TPM 2.0 specification will be used as the basis for creation of TPM specifications for different platforms.


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Trusted Computing Group announced that its TPM 2.0 (Trusted Platform Module) Library Specification was approved as a formal international standard under ISO/IEC (the International Organization for Standardization and the International Electrotechnical Commission). TCG has 90+ specifications and guidance documents to help build a trusted computing environment.

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