Paper 2025/492

Endorser Peer Anonymization in Hyperledger Fabric for Consortium of Organizations

Dharani J, Thiagarajar College of Engineering
Sundarakantham K, Thiagarajar College of Engineering
Kunwar Singh, National Institute of Technology, Tiruchirappalli
Mercy Shalinie S, Thiagarajar College of Engineering
Abstract

Hyperledger Fabric is a unique permissioned platform for implementing blockchain in a consortium. It has a distinct transaction flow of execute-order-validate. During the execution phase, a pre-determined set of endorsing peers execute a transaction and sign the transaction response. This process is termed endorsement. In the validation phase, peers validate the transaction with reference to an endorsement policy. The identity of the endorsing organizations is obtainable to all the nodes in the network through the endorser signature and endorsement policy. Knowing this has led to serious vulnerabilities in the blockchain network. In this paper, we propose a privacy-preserving endorsement system which conceals both endorser signature and endorsement policy. Endorser is anonymized by replacing the signature scheme with a scoped-linkable threshold ring signature scheme. Endorsement policy is secured using Pedersen commitments and non-interactive proof of knowledge of integer vector. We also achieve efficiency in the computation by employing non-interactive proof of co-prime roots. We provide the necessary security analysis to prove that the proposed work guarantees anonymity and unlinkability properties. A comparative analysis of our work with an existing framework is provided which shows that the proposed scheme offers higher level of security and it is optimal in terms of efficiency.

Metadata
Available format(s)
PDF
Category
Applications
Publication info
Preprint.
Keywords
Hyperledger Fabricblockchainlinkable threshold ring signatureendorsement policynon-interactive zero knowledge
Contact author(s)
jdicse @ tce edu
kskcse @ tce edu
kunwar @ nitt edu
shalinie @ tce edu
History
2025-03-17: approved
2025-03-15: received
See all versions
Short URL
https://ia.cr/2025/492
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2025/492,
      author = {Dharani J and Sundarakantham K and Kunwar Singh and Mercy Shalinie S},
      title = {Endorser Peer Anonymization in Hyperledger Fabric for Consortium of Organizations},
      howpublished = {Cryptology {ePrint} Archive, Paper 2025/492},
      year = {2025},
      url = {https://eprint.iacr.org/2025/492}
}
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