John S. Koh
Department of Computer Science
511 CS Building
500 W 120th St
New York, NY 10027, USA
I am a recent recipient of the Ph.D degree in Computer Science at Columbia University, and am now working in security research and engineering. My research focuses on usable security. My advisors were Steven M. Bellovin and Jason Nieh.
John S. Koh, Jason Nieh, and Steven M. Bellovin. Encrypted Cloud Photo Storage Using Google Photo. In Proceedings of the 19th Annual International Conference on Mobile Systems, Applications, and Services, Virtual WI, USA, June 24 -- July 2 2021. PDF.
Shih-Wei Li, John S. Koh, and Jason Nieh. Protecting Cloud Virtual Machines from Hypervisor and Host Operating System Exploits. In Proceedings of the 28th USENIX Security Symposium, Santa Clara, CA, USA, August 2019. PDF.
John S. Koh, Steven M. Bellovin, and Jason Nieh. Why Joanie Can Encrypt: Easy Email Encryption with Easy Key Management. EuroSys 2019, Dresden, DE, March 2019. PDF.
John S. Koh, "Why Joanie Can Encrypt: Easy Email Encryption with Easy Key Management." EuroSys 2019, Dresden, DE, March 2019. PDF (14 MiB).
John S. Koh, "Mitigating Email Attacks with Usable Email Encryption." HotSec 2017, Vancouver, BC: USENIX Association, 2017. PDF.