TRUSTED PLATFORM MODULE (TPM)

http://www.trust.rub.de/projects/linux-device-driver-infineon-tpm/linuxinfineontpmdriver_details

The main chip contains a special security controller with some internal, non-volatile ROM for the firmware, non-volatile EEPROM for the data and RAM.
Furthermore, it contains a cryptographic engine for accelerating encryption and decryption processes, a hash accelerator and a random number generator (needed to generate secure cryptographic keys).