Yashvanth Kondi

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Welcome!

I am a Postdoctoral Researcher at Aarhus University, where I am hosted by Claudio Orlandi.

My research interests lie in the design of modern cryptographic protocols with a focus on Secure Multiparty Computation (MPC), and Zero-knowledge (ZK) proofs. My interests span MPC techniques to remove single points of failure in widely deployed cryptographic systems (i.e. threshold cryptography), and ZK proofs tailored to practical applications.

Reach me at mail at ykondi dot net .

I completed my PhD at Northeastern in 2022, under the supervision of abhi shelat (find my thesis here). I received my Bachelor's and Master's degrees from the International Institute of Information Technology, Bangalore (IIITB) in 2017, where I was advised by Ashish Choudhury. I was also supervised by Arpita Patra at the Indian Institute of Science (IISc).

I spent summer 2020 (and part-time Fall 2020) interning with the crypto group at Novi Research, where I was hosted by Valeria Nikolaenko. I visited Claudio Orlandi at the Aarhus Crypto Group in summer 2019.


Publications
Improved Straight-Line Extraction in the Random Oracle Model With Applications to Signature Aggregation
ASIACRYPT 2022
Yashvanth Kondi and abhi shelat
[TL;DR] [paper] [.bib]


Guaranteed Output in O(sqrt(n)) Rounds for Round-Robin Sampling Protocols
EUROCRYPT 2022
Ran Cohen, Jack Doerner, Yashvanth Kondi, and abhi shelat
[TL;DR] [paper] [video] [slides] [.bib]

Threshold Schnorr with Stateless Deterministic Signing from Standard Assumptions
CRYPTO 2021
François Garillot, Yashvanth Kondi, Payman Mohassel, and Valeria Nikolaenko
[TL;DR] [paper] [videos: short, long] [slides] [.bib]

Non-interactive half-aggregation of EdDSA and variants of Schnorr signatures
CT-RSA 2021
Konstantinos Chalkias, François Garillot, Yashvanth Kondi, and Valeria Nikolaenko
[TL;DR] [paper] [video] [slides] [code] [.bib]

Refresh When You Wake Up: Proactive Threshold Wallets with Offline Devices
IEEE S&P (Oakland) 2021
Yashvanth Kondi, Bernardo Magri, Claudio Orlandi, and Omer Shlomovits
[TL;DR] [paper] [video] [slides] [code] [.bib]

Multiparty Generation of an RSA Modulus
CRYPTO 2020
Journal of Cryptology (full version)
Megan Chen, Ran Cohen, Jack Doerner, Yashvanth Kondi, Eysa Lee, Schuyler Rosefield, and abhi shelat
[TL;DR] [paper] [videos: short, long (Jack)] [slides] [.bib]

Threshold ECDSA from ECDSA Assumptions: The Multiparty Case
IEEE S&P (Oakland) 2019
Jack Doerner, Yashvanth Kondi, Eysa Lee, and abhi shelat
[TL;DR] [paper] [video] [slides] [code] [.bib]

Secure Two-party Threshold ECDSA from ECDSA Assumptions
IEEE S&P (Oakland) 2018
Jack Doerner, Yashvanth Kondi, Eysa Lee, and abhi shelat
[TL;DR] [paper] [slides] [code] [.bib]

Efficient Adaptively Secure Zero-knowledge from Garbled Circuits
PKC 2018
Chaya Ganesh, Yashvanth Kondi, Arpita Patra, and Pratik Sarkar
[TL;DR] [paper] [slides] [.bib]

Privacy-Free Garbled Circuits for Formulas: Size Zero and Information-Theoretic
CRYPTO 2017
Yashvanth Kondi and Arpita Patra
[TL;DR] [paper] [video] [.bib]


External Reviews
Journal of Cryptology, IEEE T-IFS.
EUROCRYPT (2022, 2021, 2020, 2019, 2018), CRYPTO (2022, 2021, 2018), CCS (2022, 2019) PODC (2021), ASIACRYPT (2022, 2020, 2019, 2018, 2017), TCC (2020, 2019), PKC (2022, 2021, 2019, 2017), SCN (2020)