The TPM is a low-cost, but powerful and flexible, crypto-processor. The TPM is both an industry and international standard (ISO/IEC) specification with wide international support. The TPM is an evolving standard: Individuals, organizations and governments that would like to participate in its growth should join the Trusted Computing Group (TCG.) TCG has many TPM-related standards activities, including specifications that describe how TPMs are built into platforms, standardized software-stacks for building TPM applications, as well as protocol design and digital certificate profiles. This allows vendors to quickly build high-quality and interoperable TPM implementations. Most of the normative behavioral specification is written in a subset of the C programming language, and the TPM programming interface is defined in machine-readable tables. The TPM2.0 specification is unique in that it is machine readable. TPM2.0 is also making increasing inroads into network equipment, mobile and IoT devices. TPM2.0 devices are now available from many vendors, and are incorporated into most business class PCs and many servers. Many new concepts and features were introduced with TPM2.0, including crypto-agility, easier management, a more flexible authorization model, and better extensibility. More recently, Microsoft architected and and edited the TPM2.0 specification. Microsoft invented and contributed the attestation, sealing and Platform Configuration Register (PCR) features to the original TPM, and contributed to the overall design. Microsoft has led the architecture and adoption of the TPM since its inception.

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