The rapid development of IoT services is based on a wide variety of networked devices, such as sensors, actuators or gateways, etc. However, not all of these devices are of high value and high specification, and a large proportion of these devices are small Low-cost devices.However, some of the recent high-profile attacks have shown that even low-cost devices have to be secure because they are likely to be the entrance to hacking large systems.In a word, the connected assets on the Internet of Things The number is increasing, hacker attack surface will also be expanded.Therefore, we need a more powerful and scalable defense system.
Platform Security Architecture (PSA) into Arm Platform Security Architecture is a monolithic framework of threat models, security analytics, and hardware and firmware architecture specifications PSA provides a framework based on industry best practices that enables hardware and software A consistent security design at the firmware level provides general rules and a more cost-effective way to make safer devices. In addition, Arm has introduced an open source reference implementation of the PSA firmware for Armv8-M-based devices. The overall design to build: analysis, architecture and implementation 1. Analysis Starting from a series of threat models and security analysis, combined with assets and potential threats to consider a variety of IoT use cases, PSA model analysis included as examples and guidance The principle is used to solve similar problems encountered in other cases, based on a common formal security certification process in the industry.
2. Architecture Hardware and firmware architecture specifications cover the core security principles identified through security analysis, the design of chips and devices that can be used for these principles, and the consistent capabilities and interfaces that these common principles include device identity, Trusted Startup, secure OTA software updates, and certificate-based authentication.
3. Implementation Arm offers a variety of security technologies and chip IP to help designers build more secure systems, while the open source Trusted Firmware-M will serve as a software entry point for the industry to provide a reference for the PSA implementation.
The value of the Arm ecosystem is that it offers versatility and choice to end-users to benefit the Internet of Things as well as a broad range of related technologies and a broad spectrum of suppliers. "Arm discovered this potential, recognizing also the Internet of Things devices, systems and Infrastructure Risks PSA provides a common framework for the entire ecosystem, enabling chip designers, device developers, cloud and network infrastructure providers, and software vendors to benefit from it.
Changing the Safe Economy Arm is building an economical, scalable and easy-to-implement security framework that will lay the groundwork for more secure equipment in the industry. Security is no longer an optional option and the industry as a whole has a responsibility to protect us Department of the Internet world.
For more in-depth information, read our white paper, "Platform Security Architecture Overview," which covers: • PSA Building Blocks • Threat Models and Security Analysis • Architectural Specifications Files • Trusted Firmware-M Reference Implementation • Ecosystem Enablement