What is Quantum Computer Security?

Quantum computing is emerging as a transformative technology capable of solving problems beyond classical supercomputers’ reach. Major platforms like IBM Quantum, Amazon Braket, and Microsoft Azure now offer cloud-based quantum processors, making this technology widely accessible. While much attention focuses on post-quantum cryptography, protecting classical systems from quantum attacks, my work focuses on complementary aspects: securing quantum computers themselves from security threats.

Quantum computers offer some security advantages. The no-cloning theorem prevents exact copying of unknown quantum states, eliminating attack vectors like buffer overflow exploits that rely on replicating memory. However, quantum systems face entirely new vulnerabilities. Unlike classical processors, quantum computers require extensive classical control infrastructure—signal generators, mixers, and FPGAs—that remain understudied from a security perspective. Their large physical footprint makes them more accessible to physical probing and side-channel attacks targeting classical control pathways. Without quantum memory or networking, current systems embed all data directly in quantum programs. On cloud platforms, submitted jobs contain hardcoded constants and data that, if intercepted, could expose sensitive information. These unique challenges create significant research opportunities. As quantum computing becomes practical, system security has emerged as a critical research frontier. Recent studies reveal vulnerabilities across the entire quantum stack—from hardware to compilers to algorithms—while proposing innovative defense mechanisms.

The Path Forward

As quantum systems advance, security must evolve alongside. Robust defenses across hardware, software, and algorithms are essential to ensure quantum computing delivers trustworthy, resilient systems for sensitive computations. My research work contributes to this critical research frontier, exploring vulnerabilities and pioneering defenses to safeguard the quantum future.