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Explore the challenges and potential solutions for implementing post-quantum signatures in the Web Public Key Infrastructure (WebPKI) through this 55-minute technical talk. Learn why directly replacing classical algorithms with NIST-standardized post-quantum signature algorithms would cause significant performance issues, potentially hindering widespread adoption before quantum computers become a threat. Dive into promising deployment strategies including TLS extensions for reducing signature transmission, authentication through key agreement mechanisms, and comprehensive WebPKI restructuring approaches. Examine ongoing research evaluating these proposals' feasibility and addressing critical uncertainties in the field. Delivered by Cloudflare Research Engineer Luke Valenta, gain expert insights into securing the future of web cryptography against quantum threats.
