Rishabh | UCSD

About me

I am a computer science Ph.D. student at UCSD where I am fortunate to be advised by Prof. Mihir Bellare. I am broadly interested in cryptography and provable security.

At UCSD, I am part of the CryptoSec and Theory groups. Previously, I spent two years at Microsoft working as a software engineer after completing my B.E in Computer Science and Engineering at BIT, Mesra.

Selected Publications

Just-in-time-OPRFs and a modular framework for fast private set intersection

with Mihir Bellare, Doreen Riepel

Crypto, 2026
UCX is all you need: A universal transform for committing authenticated encryption

with Mihir Bellare, Nujud Senan, Basel Alomair

Crypto, 2026
The Concrete Security of Two-Party Computation: Simple Definitions, and Tight Proofs for PSI and OPRFs

with Mihir Bellare, Doreen Riepel and Ali Aldakheel

Asiacrypt, 2024

Talks

The Concrete Security of Two Party Computation
- IISC, Bengaluru : Crypto Seminar
- IIT, Bombay : Trust Lab Colloquium series (video)
- UCSD Theory lunch
Security of Oblivious Pseudorandom Functions
- UCSD Theory lunch

Teaching

Teaching Assistant (UCSD)
- CSE 207a: Modern Cryptography: Winter 25, 26
- CSE 107: Intro To Modern Cryptography: Spring 22 to Spring 23, Spring 24, Fall 24, 25
- CSE 105: Theory of Computation: Fall 21, 26
- CSE 101: Design and Analysis of Algorithms: Summer 22

Service

Sub-reviewer for EuroCrypt 2024, ACNS 2025, PKC 2025, Crypto 2025.