By Te Sun Han
From the stories: "This ebook properly enhances the present literature on info and coding conception via focusing on arbitrary nonstationary and/or nonergodic resources and channels with arbitrarily huge alphabets. in spite of such generality the authors have controlled to effectively achieve a hugely unconventional yet very fertile exposition rendering new insights into many problems." -- MATHEMATICAL REVIEWS
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Protected capabilities refers to the shielded execution environment and a protected cryptographic key storage. Integrity measurement refers to the process of cryptographically hashing the executed programs before execution. Whereas system integrity reporting is referring to the process of attesting the system state to an external requester. The TPM is in principle a coprocessor realizing cryptographic services, similar to the services provided by SmartCards. Some manufacturers even share the security controller architecture between SmartCards and TPMs.
Whenever a PCR is updated, a new entry to the SML is created to reflect the inputs and their temporal sequence. The five localities in PCR17 to PCR21 define special usage for PCRs to allow various trusted processes to communicate with the TPM. Using these localities, the TPM is aware of which process is sending commands. The locality 4 is usually utilized to authenticate the processor and to enable the dynamic Root-of-Trust execution (cf. 1). Hence, the representation of a particular process may remain unchanged, even if other parts of the configuration have been modified.
The CRTM represents the fundamental component for integrity measurements. The RTS and RTR are both implemented in the TPM itself and guarded by the Storage Root Key (SRK) and the Endorsment Key (EK), respectively. Securely storing the data being processed by the TPM is the purpose of the RTS. Reporting the system integrity information to an external requester is provided by the RTR (cf. 7). 2. It additionally details series of necessary commands for initialization to reach the operational state after a reboot.