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Efficient Merkle-Tree Consistent Accumulator

  • Anna Mendonca
  • , Hudson Shi
  • , Triet Huynh
  • , Ivan Pryvalov
  • , Amir Herzberg
  • University of Connecticut
  • Brandenburg University of Technology
  • University of Luxembourg

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A consistent accumulator computes a digest for a dynamically-growing set of elements, with a proof of consistency of the new digest with the previous digests. Consistent accumulators are in wide use, in particular, by Certificate Transparency (CT), which is part of the Web PKI, and in blockchains.We present a significantly more efficient design for a consistent accumulator. Our design is compatible with the CT specifications; similarly to the widely-used, open-source CT implementation, it uses a Merkle tree, but much more efficiently. We provide open source implementation, security analysis and experimental evaluation showing the performance improvements.

Original languageEnglish
Title of host publicationProceedings - 2026 56th Annual IEEE International Conference on Dependable Systems and Networks, DSN 2026
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages366-378
Number of pages13
ISBN (Electronic)9798331551490
DOIs
StatePublished - 2026
Externally publishedYes
Event56th Annual IEEE International Conference on Dependable Systems and Networks, DSN 2026 - Charlotte, United States
Duration: 22 Jun 202625 Jun 2026

Publication series

NameProceedings - 2026 56th Annual IEEE International Conference on Dependable Systems and Networks, DSN 2026

Conference

Conference56th Annual IEEE International Conference on Dependable Systems and Networks, DSN 2026
Country/TerritoryUnited States
CityCharlotte
Period22/06/2625/06/26

Bibliographical note

Publisher Copyright:
© 2026 IEEE.

Keywords

  • Certificate Transparency
  • Cryptographic accumulators
  • Keyed accumulators
  • Merkle tree
  • Proof-of-inclusion

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