Fast Networks for High-Performance Distributed Trust

Yicheng Liu; Rafail Ostrovsky; Scott Shenker; Sam Kumar

Paper 2025/2068

Fast Networks for High-Performance Distributed Trust

Yicheng Liu

, University of California, Los Angeles

Rafail Ostrovsky

, University of California, Los Angeles

Scott Shenker

, University of California, Berkeley, International Computer Science Institute

Sam Kumar

, University of California, Los Angeles

Abstract

Organizations increasingly need to collaborate by performing a computation on their combined dataset, while keeping their data hidden from each other. Certain kinds of collaboration, such as collaborative data analytics and AI, require a level of performance beyond what current cryptographic techniques for distributed trust can provide. This is because the organizations run software in different trust domains, which can require them to communicate over WANs or the public Internet. In this paper, we explore how to instead run such applications using fast datacenter-type LANs. We show that, by carefully redesigning distributed trust frameworks for LANs, we can achieve up to order-of-magnitude better performance than naïvely using a LAN. Then, we develop deployment models for Distributed But Proximate Trust (DBPT) that allow parties to use a LAN while remaining physically and logically distinct. These developments make secure collaborative data analytics and AI significantly more practical and set new research directions for developing systems and cryptographic theory for high-performance distributed trust.

Metadata

Available format(s): PDF
Category: Implementation
Publication info: Published elsewhere. arXiv
DOI: 10.48550/arXiv.2511.00363
Keywords: distributed trust deployment model RDMA
Contact author(s): easonliu @ cs ucla edu
rafail @ cs ucla edu
shenker @ icsi berkeley edu
samkumar @ cs ucla edu
History: 2025-11-13: approved; 2025-11-08: received; See all versions
Short URL: https://ia.cr/2025/2068
License: CC BY-NC-ND

BibTeX

@misc{cryptoeprint:2025/2068,
      author = {Yicheng Liu and Rafail Ostrovsky and Scott Shenker and Sam Kumar},
      title = {Fast Networks for High-Performance Distributed Trust},
      howpublished = {Cryptology {ePrint} Archive, Paper 2025/2068},
      year = {2025},
      doi = {10.48550/arXiv.2511.00363},
      url = {https://eprint.iacr.org/2025/2068}
}