I’m a research scientist at NTT in Japan. My main research area is cryptography, though I am broadly interested in information security and theoretical computer science. My research focuses on how to protect computer program while preserving its functionality, how to achieve secure computation without leaking information, and designing efficient and versatile cryptographic building blocks. More specific topics are
- Program Obfuscation/Watermarking
- Functional Encryption
- Constrained Pseudorandom Function
- Lattice-Based Cryptography
Recent activities
- Oct. 2018. A new paper on adaptively secure constrained PRF on ePrint archive
- Oct. 2018. A new paper on bit-fixing PRF from OWF on ePrint archive
- Oct. 2018. A new paper on functional encryption on ePrint archive
- Sep. 2018. A new paper on bit-fixing PRF from LWE on ePrint archive
- Sep. 2018. A new paper on universal proxy re-encryption on ePrint archive
- Sep. 2018. The full version of the watermarking paper was accepted by SIAM Journal on Computing
- Sep. 2018. Invited to be a program committee member of CRYPTO 2019
- Aug. 2018. The revised full version of the watermarking from bilinear maps paper was accepted by IEICE journal
Contact Information
- E-mail: firstname dot lastname at gmail dot com
- Address: NTT Secure Platform Laboratories
3-9-11 Midoricho, Musashino-shi, Tokyo 180-8585 Japan
Short Bio.
- Visiting associate professor at School of Computing at Tokyo Institute of Technology from 07/2016 -
- Visiting researcher at Northeastern University at Boston during Oct. 2014 - Dec. 2015 (hosted by Daniel Wichs)
- Obtained my Ph.D. from Tokyo Institue of Technology in September 2010 (adviser: Keisuke Tanaka)
- Joined NTT Information Sharing Platform Laboratories (now, NTT Secure Platform Laboratories) in 2007
- Completed my Master’s degree in Informatics at Graduate School of Informatic Kyoto University in 2007
- Completed my Bachelor’s degree in Engineering at Kyoto University in 2005
On pronunciation of my first name
I found that it is not easy for people who do not speak Japanese to pronounce ``Ryo”. I do not know English words whose pronunciation are exactly the same as that of Ryo. The pronunciation of Rio, which is the name of a city in Brazil, is similar to that of Ryo.