The post-quantum state: a taxonomy of challenges

Cloudflare is preparing for a post-quantum future by analyzing and categorizing the challenges that quantum computers pose to cryptography. The company has identified five "kingdoms" of challenges, including protocols, implementation, standardization, community, and research levels. These challenges range from implementing efficient algorithms to coordinating migration across different systems and communicating with end-users. Cloudflare is actively collaborating with standardization bodies and organizing workshops for experts on post-quantum cryptography. The company plans to conduct more tests in various network environments and architectures to better understand the integration of post-quantum algorithms into protocols and systems.