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1
Intro
2
Secure Multiparty Computation
3
Many Flavors of Security with Abort
4
How many rounds needed for MPC?
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Main Question
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2-Round MPC w/o Broadcast
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Part 1: Impossibility Results
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Our Results: Lower Bounds
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The function for the lower bound
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1 Unanimous abort = 2nd round is BC
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2 Identifiable abort
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Part 2: Feasibility Results
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Our Results: Feasibility
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Structure of 2-round protocols
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Proof idea
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Summary
Description:
Explore a comprehensive analysis of broadcast-optimal two-round Secure Multiparty Computation (MPC) in this 22-minute conference talk presented at Eurocrypt 2020. Delve into the paper by Ran Cohen, Juan Garay, and Vassilis Zikas, examining various aspects of security with abort and the minimum rounds required for MPC. Investigate impossibility results, lower bounds, and feasibility outcomes for 2-round MPC without broadcast. Gain insights into the structure of 2-round protocols, proof ideas, and the implications of unanimous and identifiable abort. Enhance your understanding of this critical topic in cryptography and its practical applications.

Broadcast-Optimal Two-Round MPC

TheIACR
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