ISO/IEC 11889-2 (2009-05)

ISO/IEC 11889 defines the Trusted Platform Module (TPM), a device that enables trust in computing platforms in general. ISO/IEC 11889-2:2009 defines the principles of TPM operation. These include base operating modes, cryptographic algorithms and key sizes for the algorithms, basic interoperability requirements, basic protocols and the use of the protocols, and use of TPM resources.
This standard has been revised by ISO/IEC 11889-2:2015. However, the 2009 Edition remains available through 2025 to permit stakeholders to complete technical work tailoring their adoption of the 2015 Edition to meet their security and privacy objectives.