2018 Blog: This article was originally written during my time at Arm.
In a world where reliance on digital devices is ubiquitous, the constant threat of cyberattacks looms large.
Jim Wallace from Arm and Joseph Byrne from NXP delve into the intricate landscape of cybersecurity, highlighting the imperative need for robust security measures in our hyper-connected world.
The article underscores the expanding attack surface as our connectivity deepens, emphasising the crucial role of trust elements like security, resilience, and privacy. Central to this discussion is the security model triad of confidentiality, integrity, and availability (AIC), which forms the cornerstone of ensuring trust in next-generation smart edge devices, networks, and data centers.
Addressing network security, the authors elucidate successive layers of protection, from basic packet filtering at the perimeter to sophisticated access control measures at network nodes. Node hardening, ensuring nodes are secure by default, is advocated, with a focus on embedding roots of trust in hardware.
Encryption emerges as a pivotal tool in safeguarding data, both in transit and at rest. The integration of cryptographic instructions in Arm’s architecture accelerates algorithm execution, enhancing performance and security. NXP’s Layerscape processors exemplify advancements in encryption, with capabilities to offload encryption tasks and accelerate network protocols like IPsec.
The foundation for network trust lies in hardware-based trust anchors and secure boot processes, as advocated by Arm’s platform specifications. The hierarchical security architecture, illustrated by Arm’s four-layered approach, emphasises isolation and compartmentalisation to bolster security.
Virtualisation adds another layer of protection, enabling multiple operating systems to run on a single CPU while remaining isolated from each other. TrustZone technology carves out a secure execution space, augmenting device security. Arm’s CryptoCell and NXP’s Trust manager further fortify security through multi-layered hardware and middleware architecture.
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