What type of cryptoprocessor is being installed when an analyst reduces the attack surface by embedding it in the CPU?

The correct response is centered around the Trusted Platform Module (TPM), which is specifically designed to enhance security by reducing the attack surface of systems. By embedding the TPM directly into the CPU, it creates an environment that is more difficult for attackers to penetrate, as this hardware-based security feature can store cryptographic keys, passwords, and digital certificates securely.

TPMs are critical in providing secure boot processes, and they can also ensure the integrity of the platform by enabling features such as measured boot, which allows the system to validate the integrity of the operating environment before granting access. This hardware integration allows for stronger protection against various types of attacks, as it is more difficult to manipulate or bypass than software-based security measures.

Other options such as HSM (Hardware Security Module), CRLs (Certificate Revocation Lists), and PKI (Public Key Infrastructure) serve different purposes in the realm of cybersecurity, involving key management, certificate management, and cryptographic services, but they do not specifically refer to the type of dedicated security processor that minimizes the attack surface by being embedded in the CPU like the TPM does. This unique characteristic is what clearly identifies the TPM as the correct answer in this scenario.