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On Achieving “Best-in-the-Multiverse” MPC

  • 2026
  • OriginalPaper
  • Chapter
Published in:
Authors
Anasuya Acharya
Carmit Hazay
Muthuramakrishnan Venkitasubramaniam
Published in
Theory of Cryptography
Publisher
Springer Nature Switzerland

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Abstract

This chapter delves into the intricate world of secure multiparty computation (MPC), focusing on achieving 'best-in-the-multiverse' security. It explores the boundaries of MPC security by examining various adversary models, including unbounded and computationally bounded adversaries. The study characterizes when guaranteed output delivery, fairness, and security with abort can be achieved in the general adversary model, providing a comprehensive framework for understanding MPC's feasibility. The chapter presents detailed protocols and theorems, offering practical insights into enhancing MPC security across different scenarios. It also discusses the implications of these findings for real-world applications, such as secure computations involving multiple nations or entities with varying beliefs about adversary models. The text concludes with a unified protocol that achieves 'best-in-the-multiverse' security, ensuring robust protection against diverse adversarial threats.
AI Generated

This summary of the content was generated with the help of AI.

A. Acharya—Work done while the author was a PhD student at Bar-Ilan University, Israel.

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previous chapter Practical Secure Delegated Linear Algebra with Trapdoored Matrices
next chapter Information-Theoretic Broadcast-Optimal MPC
Title
On Achieving “Best-in-the-Multiverse” MPC
Authors
Anasuya Acharya
Carmit Hazay
Muthuramakrishnan Venkitasubramaniam
Copyright Year
2026
Book
Theory of Cryptography

Print ISBN: 978-3-032-12286-5

Electronic ISBN: 978-3-032-12287-2

Copyright Year: 2026

DOI
https://doi.org/10.1007/978-3-032-12287-2_5
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