Paper 2023/975

Design of Blockchain-Based Many-to-Many Anonymous Data Sharing Scheme

Esra Günsay, Middle East Technical University
Burcu E. Karakaş, Middle East Technical University
N. Gamze Orhon Kılıç, Middle East Technical University
Oğuz Yayla, Middle East Technical University

Many to many data sharing in the group setting in a cloud environment is a challenging problem that is crucial for numerous schemes. To our best knowledge, there is no generic study to allow sharing of confidential information in many to many pattern between different groups. Thus we propose a novel data sharing scheme enabling many to many sharing of encrypted data between different groups with using cryptographic techniques such as traceable ring signatures, multiple receiver key encapsulation, etc. We give a comprehensive security analysis showing our scheme is indistinguishable under user encapsulation keys and chosen plaintext attack secure under discrete logarithm assumption. We propose the implementation of our scheme, and the experimental results show that the proposed scheme is applicable for decentralized data sharing.

Available format(s)
Publication info
Data sharingBlockchainAnonymityTraceabilityKey encapsulation
Contact author(s)
gunsay @ metu edu tr
oguz @ metu edu tr
2023-07-31: revised
2023-06-21: received
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      author = {Esra Günsay and Burcu E. Karakaş and N. Gamze Orhon Kılıç and Oğuz Yayla},
      title = {Design of Blockchain-Based Many-to-Many Anonymous Data Sharing Scheme},
      howpublished = {Cryptology ePrint Archive, Paper 2023/975},
      year = {2023},
      note = {\url{}},
      url = {}
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