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Sofía Celi is a cryptography researcher and implementer at Cloudflare. She also currently leads the design and development of version 4 of the Off-the-Record (OTR) messaging protocol. She is very involved in helping end gender-based violence that uses digital tools in the Global South. She is interested in programming languages, compilers, usable security and privacy by design, post-quantum cryptography, and real-world applications of cryptography.
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