Octavio Perez-Kempner
Research Engineer
I am a Research Engineer (Kenkyū Shunin) with the Information Sharing Architecture Group at NTT Social Informatics Laboratories in Tokyo, Japan. My research focuses on trustworthy digital identity and privacy-enhancing technologies. I develop cryptographic foundations and protocols for identity systems that are secure, privacy-preserving, and practical, with current interests including anonymous credentials, digital identity wallets, advanced signature schemes, and post-quantum cryptography.
At NTT, I contribute core research on digital identity and privacy-preserving protocols that supports technical initiatives across the broader NTT ecosystem. My work aims to connect foundational cryptographic research with emerging real-world identity architectures, standards, and deployment requirements.
Previously, I was a postdoctoral researcher for nearly three years under Masayuki Abe at NTT. I earned a Ph.D. in Computer Science from École Normale Supérieure in 2022. My thesis, Malleable Cryptography: Advances and Applications to Privacy-enhancing Technologies, was supervised by David Naccache and Pascal Lafourcade. I also earned an engineering degree (Ing.) in Computer Science from Universidad de la República in 2018 (ranked 12/599). During my Ph.D. studies, I was a CIFRE fellow at be-ys Research, working on blockchain and privacy. Prior to that, I was a teaching assistant at Universidad de la República, Uruguay, from 2015 to 2018.
I am a member of the Latin Americans in Cryptography community and the International Association for Cryptologic Research (IACR). My full academic CV is available upon request. For more about me outside academia, see About. I also share some photos from my life in Japan on Flickr, and maintain a list of learning resources that students may find useful.
A Note on Service
I usually set aside time to serve as a reviewer for venues focused on cryptography and security, and I am always happy to contribute. If you believe I can assist, feel free to reach out; please make your message specific, as generic or suspicious emails are automatically filtered as spam. As a reference, I will serve or have recently served on the program committees of EuroS&P 2027, USENIX Security 2027, AFRICACRYPT 2027, CRYPTO 2026, PKC 2026, and LATINCRYPT (2025, 2023).