From Caliptra Foundation to Full Production Deployment

CryptoManager Root of Trust for use with Caliptra specification provides a production-ready Root of Trust and security orchestration solution that accelerates deployments and enables advanced security for mission-critical data center and AI infrastructure devices

• Provides Root of Trust and security orchestration interoperable with the open-source Caliptra framework
• Accelerates customer deployments with a complete hardware and software integration framework, including dedicated drivers, APIs, and system-level security applications
• Delivers best-in-class side-channel protection, cryptographic agility, integration flexibility, and support for data center and AI SoC designs

Figure 1: CryptoManager Root of Trust Supporting Caliptra Specification

SAN JOSE, Calif. – Sep. 14, 2026 – Rambus Inc. (NASDAQ: RMBS), a premier chip and silicon IP provider making data faster and safer, today announced its CryptoManager™ Root of Trust supporting the Caliptra™ specification, a production-ready Root of Trust and security orchestration solution designed to deliver enterprise-grade security for mission-critical data center and AI SoCs. Interoperable with the open Caliptra framework, the Rambus solution helps semiconductor designers accelerate deployments with added protection, flexibility and support. CryptoManager Root of Trust delivers platform-wide security awareness with proven side-channel and fault-injection protections and best-in-class cryptographic agility for a low-risk path to volume implementations of highly secure data center and AI infrastructure devices.

Caliptra is an open-source silicon Root of Trust designed for integration into data center-class SoCs. Initiated through the Open Compute Project and now developed within the CHIPS Alliance, it combines hardware, firmware and specifications to provide a common foundation for device identity, measured boot and attestation across CPUs, GPUs, AI accelerators, DPUs, networking devices and other infrastructure components. Its transparent, collaborative model supports greater consistency across devices from different suppliers.

Production-Ready Security for Customer Caliptra Deployments
With the CryptoManager Root of Trust supporting the Caliptra specification, designers can build on the open-source foundation to implement a complete production security subsystem. This addresses integration into the wider platform, provides the software and security orchestration needed for deployment, adds protection against advanced attacks, supports evolving cryptographic requirements, enables additional security certifications and maintains the solution throughout the device lifecycle.

“As the Caliptra ecosystem gains momentum, organizations need a practical path to deploy scalable and supportable security solutions in demanding production environments,” said Simon Blake-Wilson, SVP and general manager of Silicon IP at Rambus. “CryptoManager Root of Trust supporting the Caliptra specification provides the hardware, software, advanced protections and commercial support needed to accelerate deployment of differentiated, enterprise-grade security that is interoperable with the Caliptra framework.”

The CryptoManager Root of Trust supporting the Caliptra specification provides dedicated hardware-level security in an SoC, combining a secure RISC-V processor, protected memory, secure key and data storage, cryptographic accelerators, and secure interfaces. Operating alongside an unmodified open-source Caliptra Project core, it mediates interactions between the Caliptra Project core, the host processor and other SoC components so that security-sensitive operations can remain within a protected boundary while trust is extended across the wider platform.

Through specialized drivers and security applications, CryptoManager Root of Trust provides platform-level awareness enabling security monitoring, policy enforcement, secure lifecycle management, and coordinated protection of critical system resources. The CryptoManager architecture supports classical, post-quantum, and regional cryptographic algorithms, along with advanced protections against side-channel and fault injection attacks, and certification support for security standards such as FIPS 140-3 and SESIP.

By combining enterprise-grade security with simplified integration and certification readiness, the CryptoManager Root of Trust delivers a production-ready security platform for next-generation data center and AI semiconductor devices.

More Information
Learn more about the Rambus CryptoManager Root of Trust supporting the Caliptra specification here.

Forward-Looking Statements
Information set forth in this press release, including statements as to Rambus’ outlook and financial estimates and statements as to the expected timing and effects of Rambus products, constitute forward-looking statements within the meaning of the safe harbor provisions of the Private Securities Litigation Reform Act of 1995.

These statements are based on various assumptions and the current expectations of the management of Rambus and may not be accurate because of risks and uncertainties surrounding these assumptions and expectations. Factors listed below, as well as other factors, may cause actual results to differ significantly from these forward-looking statements. There is no guarantee that any of the events anticipated by these forward-looking statements will occur, or what effect they will have on the operations or financial condition of Rambus. Forward-looking statements included herein are made as of the date hereof, and Rambus undertakes no obligation to publicly update or revise any forward-looking statement unless required to do so by federal securities laws.

Major risks, uncertainties and assumptions include, but are not limited to: any statements regarding anticipated operational and financial results; any statements of expectation or belief; other factors described under “Risk Factors” in Rambus’ Annual Report on Form 10-K and Quarterly Reports on Form 10-Q; and any statements of assumptions underlying any of the foregoing. It is not possible to predict or identify all such factors. Consequently, while the list of factors presented here is considered representative, no such list should be considered to be a complete statement of all potential risks and uncertainties.

Caliptra™ is a trademark of The Linux Foundation and is managed under the CHIPS Alliance project. All rights reserved. Any use of the Caliptra name or logo in this document is purely for descriptive, educational, or reference purposes and does not imply endorsement, sponsorship, or affiliation with The Linux Foundation or CHIPS Alliance.