Rambus Hardware Root of Trust RT-645 is a fully-programmable hardware security core that protects against a wide range of attacks with state-of-the-art anti-tamper and security techniques. As the connected nature of automobiles evolves, device architects face a growing array of emerging security threats. Whether V2X, ADAS, infotainment, or other applications, one constant in automotive design is the need for a hardware root of trust based security implementation. The Rambus RT-645 is the ideal security co-processor for automotive uses. Based on a custom 32-bit RISC-V siloed and layered secure co-processor, along with dedicated secure memories, the RT-645 features a number of high-capability cryptographic accelerators like AES-AE-16, HMAC 512, RSA 4K, ECC 521, Fast DMA, Whirlpool and a NIST-compliant Random Bit Generator. Satisfying use cases such as secure boot, EVITA HSM, and protection of propriety algorithms, the ISO-26262 ASIL-D ready RT-645 is ideally suited for automotive applications where security is a top priority.