We're excited to announce the introduction of our automotive-grade CryptoManager RT-648,
our first embedded Hardware Security Module (eHSM) built around an Arm® processor and
designed for pre-integration into the Arm Compute Subsystem (CSS) ecosystem.


The RT-648 is the first Rambus Root of Trust solution to integrate a 32-bit Arm Cortex-M33
processor, aligning it more naturally with Arm-based SoC design environments, like CSS.
That matters because Arm CSS gives automotive SoC developers a more standardized and
pre-integrated foundation for building the complex compute platforms required by software-
defined vehicles through its automotive variant, Zena CSS.


By combining key building blocks for compute, safety, security, interconnect, and software
into a validated subsystem architecture, Arm Zena CSS reduces integration effort, shortens
development timelines, and enables earlier software readiness. This allows OEMs and silicon
providers to scale platforms across ADAS, IVI, and central compute workloads while still
leaving room for differentiation.


Within that context, the RT-648 extends the security foundation of the platform rather than
acting as a discrete standalone block. Its pre-integration into the Arm CSS ecosystem helps
SoC designers reduce design complexity, work within familiar Arm toolchains and workflows,
and embed hardware-based trust more cleanly into modern automotive architectures. The
result is a Root of Trust that is not only secure in its own right, but also better aligned with
the broader ecosystem shaping next-generation automotive SoC development.


The RT-648 is not just a forward-looking concept, it is already deployed today. As highlighted
in our newest white paper, Telechips has integrated the RT-648 Root of Trust into its
automotive SoCs as part of a unified, hardware-based security architecture.


​​​​This integration allows Telechips to consolidate diverse workloads onto centralized SoCs while
maintaining strict security and safety boundaries, an essential requirement for software-
defined vehicle architectures.


Download the white paper here.


As always, please feel free to reply back to me here if you have any questions or would like to
learn more about our Root of Trust IP solutions.


Thanks!