Quantum Roots of Trust: Hardware Anchors for Post-Quantum Security

The advent of large-scale quantum computers poses a serious threat to existing cryptographic systems that secure global digital communications, data integrity, and critical infrastructure. At the heart of trusted computing lies the Root of Trust (RoT), a secure hardware or software anchor responsible for bootstrapping system security. However, traditional RoTs, which rely on quantum-vulnerable algorithms like RSA and ECC, must evolve to remain viable in the post-quantum era. This paper explores the architecture and transformation of RoTs into Quantum Roots of Trust (Q-RoTs), which incorporate Post-Quantum Cryptography (PQC), Quantum Random Number Generators (QRNGs), and Physically Unclonable Functions (PUFs) to enable quantum-resilient cryptographic services. We detail the design principles of Q-RoTs and present their applicability in domains such as Quantum Key Distribution (QKD), the Internet of Things (IoT), critical infrastructure, and financial systems. Additionally, we examine implementation challenges including algorithmic agility, integration complexity, performance overheads, and sidechannel resistance and highlight promising research directions. By embedding quantum-safe primitives into trusted hardware, Q-RoTs serve as foundational enablers of scalable, future-proof security infrastructures suited for the quantum era.