A Comprehensive Framework for Building Highly Secure, Network-Connected Devices: Chip to App
Khan Reaz, Gerhard Wunder
TL;DR
The paper presents a comprehensive framework for securing network-connected devices across hardware, firmware, communication, and application layers, addressing both current and future threat landscapes. It prescribes secure key management, robust RNG, cryptographic integrity via secure boot, TLS 1.3 with optimized cipher suites, and compact certificates (CBOR) for IoT, plus a pathway to post-quantum resilience. The two operational modes—Current and Future—define standard, widely-supported primitives now and post-quantum algorithms for long-term security, with concrete recommendations for key types (Ed25519/Ed448), AES-GCM, and SHA-3. It also outlines secure certificate issuance workflows, root-of-trust deployment, and practical considerations for IoT PKI, aiming to help manufacturers and admins maintain confidentiality, integrity, and availability. The work emphasizes actionable practices, lifecycle management, and forward-looking research directions like real-time monitoring and automated threat detection to strengthen the security posture of connected devices.
Abstract
The rapid expansion of connected devices has amplified the need for robust and scalable security frameworks. This paper proposes a holistic approach to securing network-connected devices, covering essential layers: hardware, firmware, communication, and application. At the hardware level, we focus on secure key management, reliable random number generation, and protecting critical assets. Firmware security is addressed through mechanisms like cryptographic integrity validation and secure boot processes. For secure communication, we emphasize TLS 1.3 and optimized cipher suites tailored for both standard and resource-constrained devices. To overcome the challenges of IoT, compact digital certificates, such as CBOR, are recommended to reduce overhead and enhance performance. Additionally, the paper explores forward-looking solutions, including post-quantum cryptography, to future-proof systems against emerging threats. This framework provides actionable guidelines for manufacturers and system administrators to build secure devices that maintain confidentiality, integrity, and availability throughout their lifecycle.