The post-quantum migration: a modern role model of applied cryptography

Liqun Chen

Seyi Oladimeji, Axel Egon, Peter Broklyn

Shruti Jindal, Suman Sangwan

Subhajit Roy

This preprint presents a systems-security and architectural analysis of post-quantum cryptography deployment challenges in modern API ecosystems. The paper examines hybrid TLS 1.3 integration, cryptographic agility, migration strategies, API gateway architectures, certificate management, and operational considerations surrounding quantum-resilient distributed systems. The work focuses on applied cryptographic engineering and migration planning rather than proposing new cryptographic primitives. It synthesizes current standards, adversarial models, implementation constraints, and deployment considerations relevant to practical post-quantum migration for API infrastructure. Keywords: post-quantum cryptography, API security, TLS 1.3, ML-KEM, cryptographic agility, hybrid TLS.

Abraham Cano Aguilera, Raphael Frantz, Dimosthenis Iliadis-Apostolidis +8 more

New Challenges in Post-Quantum Cryptography presents a system-level perspective on the transition to post-quantum cryptography. Developed within the MSCA DN-ID QUARC consortium, the book examines how quantum computing challenges the security assumptions underlying modern cryptographic systems and explores the implications for communication networks, computing infrastructures, and digital trust frameworks. The book introduces the foundations of classical and post-quantum cryptography, discusses the quantum threat model, and examines migration strategies, hybrid cryptographic approaches, and crypto-agile system design. Particular attention is given to the deployment of post-quantum cryptography in networking environments, including protocols such as TLS, IPsec, and MACsec, as well as issues related to performance, scalability, hardware acceleration, virtualization, and secure communication infrastructures. Combining theoretical foundations with practical deployment considerations, the book explores how quantum-resilient security can be integrated into modern computing and communication infrastructures.