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Nick Sullivan

Nick Sullivan

San Francisco

Nick Sullivan was Head of Research (& Cryptography) at Cloudflare until 2023. He is passionate about improving security and privacy through cutting-edge research and the development of open standards.

SAD DNS Explained



Researchers from UC Riverside and Tsinghua University found a new way to revive a decade-old DNS cache poisoning attack. Read our deep dive into how the SAD DNS attack on DNS resolvers works, how we protect against this attack in, and what the future holds for DNS cache poisoning attacks....