Trusted Platform Module (TPM, also known as ISO/IEC 11889) is an international standard for a secure cryptoprocessor, a dedicated microcontroller designed to secure hardware through integrated cryptographic keys. TPM also refer to a chip conforming to the standard.
The Trusted Computing Group (TCG) has been addressing the trust issue and related security benefits for PCs, servers, networking gear and embedded systems for more than a decade, driven by the Trusted Platform Module (TPM) specification. 
The TPM contains several Platform Configuration Registers (PCRs) that allow secure storage and reporting of security-relevant metrics. These metrics can be used to detect changes to previous configurations and decide how to proceed.