![]() Baseboard Management Controller (BMC) or Platform Controller Hub (PHC).Some of the salient ones are mentioned below. To achieve the security measures that Titan promises, it comprises of several components. This allows it to observe every byte of the boot firmware. ![]() The chip communicates with the main CPU via the SPI bus and interposes between the boot firmware flash of the components like BMC or PCH. Titan is a specially designed chip that not only meets these expectations but also provides two important additional security properties – remediation and first-instruction integrity. To protect this boot process, Google uses secure boot which relies on a combination of an authenticated boot firmware and a bootloader, along with digitally signed boot files, to provide the desired security measures. These components interact with each other systematically to boot the machines. The machines in Google’s data centers have multiple components including CPUs, RAM, BMC, Network Interface Controller (NIC), boot firmware, boot firmware flash, and persistent storage. What Does the Titan Security Chip Comprise of? As of today, Google currently uses the Titan security chips to protect the servers running its own services like Google Search, Gmail, and YouTube. When the chip was first unveiled back in March of this year, Google planned to use the processor to give each of its servers an individual identity. The chip is of the size of a small stud earring and has already been installed in many of the computer servers and network cards that populate Google’s massive data centers. The chip is a secure, low-power micro-controller created to ensure that systems always boot from the last known good state. Titan is a part of Google Cloud Platform (GCP) which is designed, built, and operated with the goal to protect customers’ code and data. Currently, the attackers do this mainly by exploring firmware vulnerabilities to overcome operating system defenses and installing rootkits that can persist even after the operating system has been reinstalled. In the simplest of words, Titan is a security chip that prevents the type of attacks where government spies intercept hardware and insert a firmware implant.
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