quantum-resistant encryption

Quantum-resistant encryption, also known as Post-Quantum Cryptography (PQC), comprises cryptographic algorithms designed to be secure against attacks from both classical and quantum computers. The need arises from Shor's algorithm, which can theoretically break current public-key systems like RSA and ECC once large-scale quantum computers are built. PQC algorithms run on classical computers but are based on mathematical problems believed to be hard for quantum computers to solve. The U.S. National Institute of Standards and Technology (NIST) is leading a standardization process, having selected algorithms like CRYSTALS-Kyber and CRYSTALS-Dilithium. Within an ISO/IEC 27001 framework, implementing PQC is a crucial control for managing emerging technology risks, ensuring long-term data confidentiality and achieving crypto-agility. It is distinct from quantum cryptography (e.g., QKD), which uses quantum mechanics for secure communication.

Applying quantum-resistant encryption in an enterprise involves a systematic, risk-based approach. The first step is a crypto-inventory and risk assessment to identify all systems using public-key cryptography and prioritize them based on data sensitivity and required lifespan. Next, a migration strategy is developed, often starting with a 'hybrid mode' as recommended by NIST, which combines a classical algorithm with a PQC algorithm to ensure security and backward compatibility during the transition. This strategy must be tested in a non-production environment to evaluate performance impacts. Finally, a phased deployment is executed, starting with the most critical systems. Measurable outcomes include mitigating 'harvest now, decrypt later' risks, ensuring future compliance with regulations like the EU's DORA, and improving audit pass rates by demonstrating proactive risk management.

Taiwanese enterprises face several key challenges. First, uncertainty due to evolving standards; while NIST has selected algorithms, final standards are still pending, creating hesitancy. Second, a lack of in-house expertise and resources, particularly for SMEs, to perform the complex crypto-inventory and migration. Third, supply chain dependency, as many businesses rely on third-party vendors for hardware and software, making their transition timeline dependent on vendor readiness. To overcome these, enterprises should prioritize crypto-agility by creating a crypto-asset inventory now. Adopting a hybrid approach can serve as an interim solution. Partnering with external experts can bridge the skills gap, and incorporating PQC-readiness into vendor contracts and risk management processes is critical to drive the supply chain forward.

Winners Consulting specializes in quantum-resistant encryption for Taiwan enterprises, delivering compliant management systems within 90 days. Free consultation: https://winners.com.tw/contact