TPM's technical specification is publicly available, driven by the Trusted Computing Group (TCG). The latest version TPM 2.0 (released October 2014), is a major redesign of the specification which adds new functionality and fixes weaknesses of the former TPM 1.2.
===dTPM=== (Discrete Trusted Platform Module)===
* TPM is a microcontroller that stores encryption keys, passwords and digital certificates.
* Advances in on processor technologies combined with the flexibility of the TPM protocols mean that it is possible to implement the TPM as an integrated solution or in firmware.
===fTPM=== (Firmware Trust Platform Module)===
* fTPM is a Firmware based TPM 2.0 implementation.